Verified answer

Answer:

pages = k minutes

p = k m

5 = k 10

k = 5/10

k = 1/2

k = 0.5

9 = (0.5) 18

9 = 9 (true)

Is her time proportional to the number of pages read? Yes

Why? Because when we substitute 9 and 18 to the first variation equation, it is true given that k = 0.5.