The formula for the area, A, of a circle is A = πr2 , where r is the circle’s radius, and the formula for the circumference, C, of a circle is C = πd , where d is the circle’s diameter. Which statement is correct?

Question

rea__ · Answer

A)	A circle’s radius and area are in a proportional relationship, and so are its diameter and circumference.	
B)	A circle’s radius and area are not in a proportional relationship, but its diameter and circumference are.	
C)	A circle’s radius and area are in a proportional relationship, but its diameter and circumference are not.	
D)	A circle’s radius and area are not in a proportional relationship, and neither are its diameter and circumference.

ijlal · Answer

Option A is your answer 
Area of the circle is directly proportional to radius which means if you increase the radius the area would increase and vice versa same as the with circumference is directly proportional to diameter the more the diameter the more the circumference 
$$A \alpha r^2$$
$$A=\pi r^2$$ where pi is the constant of proportionality
now,
$$C \alpha d$$
$$C=\pi d$$
 @rea__

rea__ · Answer

no its b -_-

rea__ · Answer

i dont see why people put answers n not sure like u f ing people questions