18in x 40in Half of 80 is 40, half of 36 is 18
9in x 20in 1/4 of 80 is 20, 1/4 of 36 is 9
Step-by-step explanation:
Taking the derivative of both sides with respect to x, we get


Solving for
, we get

Answer: 1.9x2.8 + 3.2+2.8 = 14.28
HOPE THIS HELPS
Gradient =
Change in Y
———————
Change in X
Change in Y is 18 - 14 = 4
Change in X is -20 - 30 = -50
Therefore the gradient is 4/-50 which is then simplified to - (2/25)