Help me i’ll give you Brainliest !

A

Step-by-step explanation:

The line is going up so it is positive. That leaves A and B. By counting squares, you can see that the line is going up at a rate of 2/3. you find this by counting from where it crosses on y=-2 too y=0. And you see the y has changes two places and the x has changed 3. Or do it in the formula y(final)-y(initial)/x(final)-x(initial) so (0-(-2))/(3-0) = 2/3. So the equation must have 2/3. So the equation is A

f(x) has value 150 at x= 0

and 0 at x= 3

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