To plot a line you need 2 points from the line.

You can read them from the graph using zoom in and zoom out:

So, what is done here the equation 

4x-5y=6 is transformed into slope-intercept form

Than all you need to do is plug values for 'x' or 'y' to find at least two points from the line.

For 'x = 0' if we solve for 'y' we get

y = (4/5)*0 - 6/5

y = -6/5

y = -1.2

One point is (0, -1.2)

For 'x = 0' if we solve for 'y' we get

0 = (4/5)*x - 6/5

x = (6/5)*(5/4)

x = 6/4

x = 1.5

Second point is (1.5, 0).