Answer:
C
Step-by-step explanation:
A) 20 hours
:>>>
25-5=20
this is 14)
and 15)
n=36+16
n=52
Rate of change = 9
m= (y2 - y1) / (x2 - x1)
= (25 - 7) / (4 - 2)
= 18 / 2
= 9