Help me on this question someone

a, b and f

both arent proportianal or it would line up

but m is linear(straight) whil n isnt because it curves

and  they both do increase

You said:

add 5 subtract 1

step-by-step explanation:

f(x) has value 150 at x= 0

and 0 at x= 3

so d(f(x))/dt = slope = -150/3 = -50