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#1151 Re: Help Me ! » Point Slope Form of an Equation » 2011-05-26 09:05:08
y=mx+b
y=8x+b
83=8(5)+b
83=40+b
83-40=b
43=b
y=8X+43
#1152 Re: Help Me ! » Point Slope Form of an Equation » 2011-05-26 08:49:32
so it would be (1,115) and (5, 83). right?
#1153 Re: Help Me ! » Point Slope Form of an Equation » 2011-05-26 08:32:01
so should it be (115,1) , (83,2)?
please help because am trying to finish my algebra online lessons fast 
#1154 Re: Help Me ! » Point Slope Form of an Equation » 2011-05-26 03:44:07
? am still confused
#1155 Help Me ! » Point Slope Form of an Equation » 2011-05-26 03:21:26
- zee-f
- Replies: 85
11-In January, Sam's electric bill was 115.00 dollars. In May, it was 83.00 dollars. Using the number of the month, for example January would be 1, February would be 2, etc, write two ordered pairs to represent the two electric bills.
11- (1,115) , (2,83)
12-Find the slope-intercept form of the equation that goes through these two points.
12- 83-115/2-1 =-32/1= -32
y=-32x+b
83=-32(2)+b
83=-64+b
147=b
y= -32x+147
13. Find the point-slope form of the equation that goes through these two points.
13- y-115=-32(x-1)
y-115=-32x--32
y=-32x- -147
y=-32x+147
14.If this trend continues, what will Sam's bill be in July?
am really confused on the rest help please 
15.At Generic High School, in the year 2001, there were 20 students per every computer. In 2008, there were 4.5 students per computer. Write two ordered pairs to represent the ratio of student to computer.
16. Find the slope-intercept form of the equation that goes through these two points.
17. Find the point-slope form of the equation that goes through these two points.
18.During which year was there 10 computers per student?
#1156 Re: Help Me ! » Point Slope Form of an Equation » 2011-05-26 03:05:37
thanx for the help
#1157 Re: Help Me ! » Point Slope Form of an Equation » 2011-05-26 02:43:49
thanx
#1158 Help Me ! » Point Slope Form of an Equation » 2011-05-26 02:32:06
- zee-f
- Replies: 19
hey can anybody help me see if i did these correct thanx
1. Slope = ½; (h, k) = (1, -2)
y-k=m(x-h)
y+2=1/2(x-1)
y+2=1/2x-1/2
-2 -2
y=1/2X+3/2
2. Slope equals 2 and the line goes through the point (-1, 3)
2. y-k=m(x-h)
y-3=2(x--1)
y-3=2(x+1)
y-3=2x+2
y=2x+-1
3. The line goes through the points (8,5) and (9, 6)
3. 6-5\9-8=1\1=1 slope=1
y-k=m(x-h)
y-5=1(x-8)
y-5=1x-8
y=1x+3
4. The line goes through the points (-1, -7) and (-8, -2)
4. -5/7=slope or M
y-k=m(x-h)
y+2=-5/7(x+8)
y=-5/7x+6
5. The line goes through the points (1/2, 3/2) and (-1/4, 5/4)
5- m=1/3
y-3/2=1/3(x-1/2)
y-3/2=1/3x-1/6
y=1/3x+4/3
#1159 Re: Help Me ! » help please am sooooooo confused :(( » 2011-05-17 07:56:58
thanx alot 
)
#1160 Re: Help Me ! » help please am sooooooo confused :(( » 2011-05-17 00:58:03
can anybody help me i did numbers 20 and 18 but i just cant figure the other ones out
16. The bigger the number the slope is in the equation, what do you notice happens to the graph?
17.What common characteristic do you notice about graphs with a positive slope? Is there a similar common characteristic for graphs with negative slopes?
18. What would the slope of the graph that goes through the two points (-3, 4) and (2, 4) be? What would this graph look like? Think back to lesson 10, What should the equation of this line be?
The slope for (-3, 4) and (2, 4) would be
M=(4-4)/(2-3)=0/5
M=0/5
Y=mx+b
2=0/5*4+b
2=0+b
B=2
Y=0/5x+2
It looks like a horizontal line so the equation should be y=2
19- What would the y-intercept of the equation y = 3/4x be?
20. When we have zero on the bottom of the slope, we call that no slope because of the rule that zero can never be in the denominator of a fraction. An example of this would be a line that goes through the points (2, -3) and (2, 4). If you plotted these points, what would this graph look like? What should this equation be?
#20-
(2, -3) and (2, 4).
m=4+3/2-2
m=7/0
slope is undefined
so the line would look like a vertical line
#1161 Help Me ! » help please am sooooooo confused :(( » 2011-05-16 06:06:59
- zee-f
- Replies: 11
16. The bigger the number the slope is in the equation, what do you notice happens to the graph?
17.What common characteristic do you notice about graphs with a positive slope? Is there a similar common characteristic for graphs with negative slopes?
18. What would the slope of the graph that goes through the two points (-3, 4) and (2, 4) be? What would this graph look like? Think back to lesson 10, What should the equation of this line be?
19.What would the y-intercept of the equation y = 3/4x be?
20. When we have zero on the bottom of the slope, we call that no slope because of the rule that zero can never be in the denominator of a fraction. An example of this would be a line that goes through the points (2, -3) and (2, 4). If you plotted these points, what would this graph look like? What should this equation be?
#1162 Re: Help Me ! » Solving Absolute Value Equations » 2011-05-12 23:36:38
thank you soooooo much ive been searching every where for the explanation for this thanx yup its all clear
#1163 Re: Help Me ! » Solving Absolute Value Equations » 2011-05-12 23:10:19
yup thanx
#1164 Help Me ! » Solving Absolute Value Equations » 2011-05-12 23:08:38
- zee-f
- Replies: 3
Which equation is represented by the number line?
A|x| = -4
B|x 3| = -4
C|x - 3| = 4
D|x 3| = 0
E|x| = -1
#1165 Re: Help Me ! » Solving Absolute Value Equations » 2011-05-12 22:50:29
thanx no am taking online courses and the lesson is called Solving Absolute Value Equations ) :)
#1166 Re: Help Me ! » Solving Absolute Value Equations » 2011-05-12 22:33:53
thanx for the help but how did u simplify the 1/2 ??????
thanx:)):):)
#1167 Help Me ! » Solving Absolute Value Equations » 2011-05-12 22:09:34
- zee-f
- Replies: 7
1/2|4x 8| - 7 = 3
A-x = 7, x = -3
B-x = 7, x = 4
C-x = 0, x = -4
d-x = 13, x = 3
d-x = -7, x = -4
help please i have to show my work i tried soling it allot ended up with x = 1, x = -1 so it was incorrect