Answer:
f(-5) = 15
Step-by-step explanation:
f(x) is a straight line with a y-intercept of f(0) = y = 40 and a x-intercept of x = -40/5 = -8.
With x = -5 and substituting it into f(x) the following occurs:
f(-5) = 5×(-5) + 40 = -25 +40 = 15
∴ When x=-5, y will be 15 and the new coordinates will be a point on the like with (-5, 15).
