Which equation represents the proportional relationship in the table?
a: c=r+3
b: c=1/3r
c: c=3r
d: r=3c

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

Meghan has created a diagram of her city with her house, school, store, and gym identified. a. how far is it from the gym to the store? b. meghan also wants to walk to get some exercise, rather than going to the gym. she decides to walk along arc ab. how far will she walk? round to 3 decimal places.

Find the missing factor. write your answer inexponential form.9^2=9^4×