x=0

y=2(0)-1

y=-1

(0,-1)

OR

y= 2

2=2(x)-1

3=2(x)

x=3/2

(3\2, 2)

Hope that helps

do, then you will realise that you only need to plot two points

and then join them up with a ruler. I`ll take values of x as 0 and

2.

When x=0,

y=2x-1, so

y=2*0-1,so

y=-1.

when x=2,

y=2x-1, so

y=2*2-1, so

y=4-1, so

y=3.

On 2cm graph paper, and using scales of 2 cm to 1 unit on

each axis, now plot the points {0,-1} and {2,3}. Join them up

using ruler and pencil, and extend the line in each direction.

There you have the graph of y=2x-1. You can only do it this

way if the equation of the graph can be written in the form

y=mx+/- b. If the equation includes x squared or a higher

power of x, or it includes something over x, then you have

to plot each individual value of x and y. Hope this helps,

Twiggy.

y = 2x – 1

let x = 1

y = 2(1) – 1 = 1

the point is (x, y) which is (1, 1). plot that on a coordinate system.

now do that for another value for x, like 2 (hint, hint). plot that point as well.

those 2 points are really all you need for a line. connect the dots.

m is the steepness of the slope like 1/2

y is the horizontal axis like 2

x is the vertical axis like 5

b is the difference between teh x and y axis