Determine whether the following quantities are proportional. For the quantities that are proportional, determine the constant of proportionality. If the quantities are not
proportional, select the not proportional option.
a. Radius and diameter of a circle
[Select]
b. Radius and circumference of a circle
[ Select
c. Radius and area of a circle
[ Select)
d. Diameter and circumference of a circle
[ Select]
e. Diameter and area of a circle
[ Select]