Copy each equation in Exercises 31–33. Replace the boldface italic
letter with a number that shows the relationship indicated in the
table. Then copy each table and complete it by using the corresponding
equation.
32. y = -x + b
x y
1 0
2 -1
8 -7
10 ?
20 ?
40 ?
use the first ordered pair (1,0) to find b
0 = -1 + b
b = 1
so now you have the equation
y = -x + 1
and it is easy to find the last three y values.