Graphing a linear equation.

Question

I was wondering how do I come up with numbers for x to graph a linear equation. I know you come up with some then multiply it with the number that had x then add it or subtract it to whatever number is in the problem. I just don't know how to come up with the x number could someone tell me please? Could you also explain how to do this problem by coming up with the numbers x? =2x-3

Answer 1

To graph a linear equation, you pick the values for x. You can pick anything you want. Then solve for y. This creates a coordinate point in the form (x,y) which you can graph, then connect to points to make your line.

y=2x-3 You pick a few values. Lets use x=0, x=1 and x=2 (If you get to pick them you might as well make them small, positive values that are easy to work with. Plug these in

x=0

y=2(0)-3

y=0-3

y=-3

So the first point is (0,-3)

x=1

y=2(1)-3

y=2-3

y=-1

So the next point is (1,-1)

x=2

y=2(2)-3

y=4-3

y=1

So the next point is (2,1)

Plot these points and you will have your graph!