Determine whether quantities vary directly or inversely and find the constant of variation. if 5 bushels of wheat weigh 136 kg, how much do 3.5 bushels of wheat weigh?

Weight varies directly with bushels of wheat.
⇒ The more bushels of wheat, the heavier it weighs

5 bushels = 136 kg
1 bushel = 136 ÷ 5 = 27.2 kg
3.5 bushels = 27.2 x 3.5 = 95.2 kg

95.2 kg

Definitely