Answer:
i will try to help you....
65 i believe
Step-by-step explanation:
130/2
= 65
and
65 x 65 = 130
1:Contraction
2:Expansion
3:Contraction
4:Expansion
slope : 1/15
slope = change in y / change in x
change in y = 1 / change in x = 15
therefore, 1/15 = slope