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.
A circle with a 2-inch radius has a diameter of 4 inches. Write the equation for the relationship
between x and y

y =2x

Step-by-step explanation:

Hi, to answer this question we have to write an equation with the information given:

Since a circle with a 2-inch radius has a diameter of 4 inches, it means that the diameter of a circle (y) is equal to two times its radius (x).

Mathematically speaking:

y = 2 x

Feel free to ask for more if needed or if you did not understand something  

1. is 4 and 2. is 3

step-by-step explanation:

so if you look at the first one you see that 1 is to 4 and 2 is to 8 and so on, so you can see for every 1 there is a times 4 so if it were 3 then it would be 3*4 and it is 12

for number 2 it is 3 because 1 is to 3 and 2 is to 6 so for every 1 there is 3 so if it were 3 then there would be 3*3 = 9