How do you graph  y = x - 4 by plotting points?

Apr 22, 2017

Make a list of x values and their corresponding y values. Plot the (x,y) coordinates on the y against x axes. Join the dots and the straight-line graph is obtained.

Explanation:

For example:

When $x = - 2$ , $y = \left(- 2\right) - 4 = - 6$ .
When $x = 0$ , $y = \left(0\right) - 4 = - 4$ .
When $x = 3$ , $y = \left(3\right) - 4 = - 1$ .
When $x = 4$ , $y = \left(4\right) - 4 = 0$ .
And so on...

By plotting the coordinates of (-2,-6), (0,-4), (3,-1), (4,0), etc. , the points obtained will form a straight line with an equation $y = x - 4$.