Do these rates form a proportion?
21 miles in 6hours and 14.3 miles in 3 hours

These rates DO NOT  form a proportion.

Step-by-step explanation:

Two quantities P and Q are said to be in proportion is and only if:

 for all values of P and Q.

here, k = Proportionality Constant.

Case 1: when P =  21 miles , Q  = 6 hours

⇒  k 1 = 3.5

Case 2: when P =  14.3 miles , Q  = 3 hours

⇒  k 2 = 4.76

As we can see in both the cases, k 1 ≠ k 2

Hence, P is NOT PROPORTIONAL to Q.

So, these rates DO NOT  form a proportion.

for the points! : )

answer

a the answer hopes this

step-by-step explanation: