Question

if x varies directly as y write a formula connecting x and y y.use k as a constant of variation.

Answer 1

Hey pal! Here's the answer you need.

Explanation:

For any two variables x and y,

$\frac{x}{y}=k$

This formula can be used in all questions regarding distance and time, cost of filling car with petrol, etc.

For example, let there be two pairs of numbers: 4,6 and 12,x

To find x, we use the above formula.

$\frac{4}{6} = \frac{12}{x}$

$x = \frac{(12)(6)}{4}= 18$

Answer: x/y = k

I hope this answer proves to be helpful :D