Graphing lines by Graphing Two Points

Problem:

Solve the equation and graph the points and line. 

-3x+8 

where x=0 and x=4

Solution
Step 1:  

Replace x in the equation with one of the x values given. 

            x=0                                          x=4

(0+8=8)  y=8                             (-12+8=-4)  y=-4

            (0,8)                                       (4,-4) 

Solution
Step 2:  

Take (x,y) values for each equation and plot on the coordinate graph.

Solution
Step 3:  

Draw a line through the both (x,y) points