Question

there are 80 calories in every 4 - ounce serving of grapes. which equation can be used to determine the number of calories, y, in x ounces of grapes?
a ( y = 20x )
b ( y = x + 20 )
c ( y = 0.05x )
d ( y = 84 - x )

Explanation:

Step1: Find calories per ounce

To find the number of calories per ounce, we divide the total calories by the number of ounces. Given 80 calories in 4 ounces, so calories per ounce is $\frac{80}{4} = 20$.

Step2: Form the equation

The number of calories \( y \) in \( x \) ounces is the calories per ounce times the number of ounces. So the equation is \( y = 20x \).

Answer:

A. \( y = 20x \)