Question

The cost c varies directly as the numbers n of pencils is written as A. c = kn B. k+ cn C. n = k/c D. c =k/n

Answer 1

A. c = kn

Explanation:

The cost c varies directly as the numbers n of pencils

This means that c is a multiplication of a constant by n, which is the number of pencils. So the equation for the cost is given by:

`c = kn`

In which k is the constant of proportionality, that is, the cost of each pencil. So the correct answer is given by option A.