When two variable quantities have a constant (unchanged) ratio, their relationship is called a direct variation. It is said that one variable "varies directly" as the other...simply when the y-intercept is zero.
So the best answer is f(x)=2x
Answer from: Quest
r = 2.65m
good luck!
cutie~
Answer from: Quest
drop out of school or go to quizlet, quizlet is better
Two customers went to a post office. first customer paid $12 for 14 and 5 envelopes the second paid 24.80 for 10 postcards and 15 envelopes. what is cost of each envelope?