Exercise 6 Page 374

To graph the function y=8x, we will follow two steps.

1. Make a function table to find some ordered pairs.
2. Graph the ordered pairs and draw the line through them.

   Let's do these things one at a time. To make a function table, we will select some values of x which will be part of our domain. Then we will substitute these values into the function for x to find the corresponding values of y. These x- and y-values will create a set of ordered pairs.

   x	8x	y	(x,y)
   - 1	8( - 1)	- 8	( - 1, - 8)
   0	8( 0)	0	( 0, 0)
   1	8( 1)	8	( 1, 8)

   We found three ordered pairs that lie on the graph of our function. Now we will graph the ordered pairs and connect them with a straight line.

   

   The line is the complete graph of the function. The ordered pairs corresponding to any points on the line are solutions of the equation y=8x.