If y varies directly with x and y = 25 when x = 5, what is the value of k? how does this work when y = kx?

Question

asked Mar 16, 2018 228k views

2 Answers

Ryan Her · Answer 1 · 2018-03-23T07:11:24+0000

The value of k when x=5 and y=25 is:

k=5

Direct variation--

Two variables are said to be in direct variation if one variable could be written as a constant multiple of the other variable.

i.e. x and y are said to be in direct variation.

if there exist a constant k such that:

y=kx

or if x is non-zero then we have:

k=(y)/(x)

Here we are given x=5 and y=25

This means that the value of k is:

$k=(25)/(5)\\\\i.e.\\\\k=5$