21. Plot the graphs of the given equations.
a) y = x-2 b) y = 2x – 8

                            Plot the graphs of the given equations.

Part a)

Given the equation

Determining x-intercept:

So x-intercept is (2, 0)

Determining x-intercept:

So y-intercept is (0, -2)

Also

The graph of the equation is attached below, where red line indicates the graph of the equation .

Part b)

Given the equation

Determining x-intercept:

So x-intercept is (4, 0)

Determining x-intercept:

So y-intercept is (0, -8)

Also

The graph of the equation is attached below, where blue line indicates the graph of the equation .