Question

HELP PLEASE!!!

Can someone tell me what a constant of proportionality is?
Please add an example if you can!
Thanks!

Answer 1

the constant of proportionality k, is the constant value of the ratio of two proportional quantities y and x

Explanation:

k = y/x or y= kx

example : the cost of 20 books is rs. 180 how much will 15 books cost ?

a. rs. 125

b. rs. 130

c. rs. 135

d. rs. 140

answer is c. rs. 135

Answer 2

A number or number sentence that doesn't change

Explanation: