Exercise 8 Page 374

To graph the function y= 25x+2, 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	2/5x+2	y	(x,y)
   - 5	2/5( - 5)+2	0	( - 5, 0)
   -3	2/5( -3)+2	4/5	( -3, 4/5)
   -1	2/5( -1)+2	1 35	( -1, 1 35)

   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= 25x+2.