Y varies directly as xy equals 5 when X is 8 how do you find y when X is 9

Question

asked Nov 4, 2023 15.0k views

1 Answer

Alan Deep · Answer 1 · 2023-11-10T02:55:09+0000

Given, y varies directly as x

So,

$y=c\cdot x$

Where c is a constant

When y equals 5 when x is 8

So,

$\begin{gathered} 5=c\cdot8 \\ c=(5)/(8) \\ \end{gathered}$

So, the relation between y and x

now , when x = 9

Substitute with x to find y

$y=(5)/(8)\cdot9=(45)/(8)$

So, the answer is option 2. y = 45/8