Question

read the description of a proportional relationship. roxanne is measuring the diameter and the radius of different - sized circles. there is a proportional relationship between the radius of the circle in inches, x, and the diameter of the circle in inches, y. the equation that models this relationship is y = 2x. what is the diameter of a circle with a radius of 4 inches? write your answer as a whole number or decimal. inches

Explanation:

Step1: Identify the given values

Given $x = 4$ (radius) and $y = 2x$ (relationship between radius and diameter).

Step2: Substitute the value of x

Substitute $x = 4$ into $y = 2x$. So $y=2\times4$.

Step3: Calculate the result

$y = 8$.

Answer:

8