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Topic review (newest first)
A graph is a plot of a mathematical function. If you have the function f(x) = x, then calling the function for 0..100 will give back 0..100. This makes for a linear function.
Make units of water the x-axis, which goes to the right.
lol anything specific lol all of it really lol you know when you just cant seem to get you head around something no matter how you look at it. Well this is one of them things lol . i am so rubish at maths it is unbelieveable lol sorry for being a pain.
LOL this might sound like a am really really stupid but is there any way that you could make that more simpler lol. I am so bad at maths really i am.
Pound and penny.
£ and p. How do you pronounce these? Pound? Cent? I am an ignorant New Englander over the Atlantic.
First to draw the graph, you have to figure you the formula.
After that you have to find the range of both axes. you know that for x it is between 0 and a maximum of 250 units. Now you can calculate the range for y, which then goes from f(0) to f(250).
Once you have calculated the results of both of those, you need to lay it out on paper, and you can then put two points on the graph: (0, f(0)) and (250, f(250)) (written as (x, y) coordinate pairs). If you have drawn your graph accurately, you should now easily be able to read the results.
For the second part, you have to make another function: g(x), which calculates the cost for water company B. This is essentially the same as formula f(x), except with different values. First, since there is no starting charge, there's nothing to add, so the function is just .
Now that you know this, you can also calculate g(0) and g(250), in the same way as for the f(x) function. Then plot the values on the graph, and make a direct line between the two.
I hope this is enough help, any further, and I'll be giving you the solution.
The yearly water bill for a child care centre consists of a standing charge of £18 and a rate of 40p for each unit of water used. i have to draw a graph which could be used to find the cost of water up to a maximum of 250 units. and i have to lable this water board A.