What is the image of (-4, -4) after a dilation by a scale factor of 2 centered at the
origin?

f(x) has value 150 at x= 0

and 0 at x= 3

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

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value