Question

HELP PLEASE and explain

Answer 1

12) Only A ) is non-linear (it's a parabola)

13) if y is the distance, the speed is m and x the time, then:
y = ax

in the example a = 13 mil/h and y = 39 mil

y = 13.x and since y = 39 then x = 39/3 = 3 hours (answer A)