A ratio is a rate

Question

A ratio is a rate? Sometimes, always, or never true

Answer 1

Semantics.........

 

Sometimes

A ratio is a comparison of two quantities or measurements.

A rate is a special type of ratio where the quantities or measurements are of different types

 

70 miles per hour <--- that's a rate!

 

30 miles per gallon <--- that's a rate.

 

1 adult per $6 <--- that's a rate

 

 

pi = 22/7 <--- that's not a rate

 

http://www.eduplace.com/math/mathsteps/6/e/

 

 

 

Answer 2

Sometimes true, as in speed = ratio of distance to time (v = d/t)

 

Not always, as in cos(45°) = (√2)/2, i.e. the ratio of √2 to 2