find b first.
when x is 1, y is zero, and b
y=-x+b
0=-(-1)+b
means b is -1
Now, when x is 20, what is y?
y=-20+b=-20-1=-21
copy each table and complete it by using the corresponding
equation.
y= -x + b
X Y
1 0
2 -1
8 -7
10 ?
20 ?
40 ?
3 answers
Y=2x_5
Y=2x-5