Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

You are not logged in.

- Topics: Active | Unanswered

Pages: **1**

**mom****Member**- Registered: 2012-04-25
- Posts: 94

I am stumped again.

Find the equation of line L in standard form. L is parallel to y=1/3x.

I am not sure why I am thrown off. It shows line L with a point of (2,4)

I have y=-x+6 and I know that can't be correct because the slopw is 1/3 so is it y=-1/3x+6

I am really confused.

Please help to see what the answer is and why so that I can understand.

Offline

**bob bundy****Administrator**- Registered: 2010-06-20
- Posts: 8,168

hi Mom,

To be parallel it must have the same gradient, ie. 1/3

So y = (1/3)x + something..

(2,4) => 4 = (1/3)2 + something => something = 4 - 2/3

Bob

Children are not defined by school ...........The Fonz

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

Offline

**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,037

Well, we know that it must be of the form y=1/3 x+n, so we just substitute x=2 and y=4 and solve for n. Can you do that?

*Last edited by anonimnystefy (2013-05-08 06:59:03)*

Here lies the reader who will never open this book. He is forever dead.

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

The knowledge of some things as a function of age is a delta function.

Offline

**mom****Member**- Registered: 2012-04-25
- Posts: 94

Im still lost but thanks Bob

Offline

**bob bundy****Administrator**- Registered: 2010-06-20
- Posts: 8,168

http://www.mathsisfun.com/equation_of_line.html

and

http://www.mathsisfun.com/data/straight_line_graph.html

Bob

Children are not defined by school ...........The Fonz

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

Offline

**stapel****Member**- Registered: 2006-07-22
- Posts: 15

mom wrote:

Im still lost but thanks Bob

On which part are you lost? Thank you!

Offline

**johnnie too lazy log in****Guest**

simple, just note that it goes thru (0,0), so subtract from y and and x the 2 and the 4.

(y-4) = (1/3)(x-2)

that's all there is to it.

very simple.

the end.

lol.

Pages: **1**