Answer:
$33 for 11 packs of paper
I disagree with the student because the slope is the rate of change. The slope would be 10 because the rocks are increasing by 10 every month.
2 is common factor
2x=2(x)
4=2(2)
ab+ac=a(b+c)
2(x)+2(2)=2(x+2)
Slope = (-3 - (-15))/(-9 - (-5)) = - 12/4 = -3
