Question

Help! For each function, determine whether y varies directly with x.if so, identify the constant variation
question 4y-7x=0
then i put 4y=7x
what to do next?

Answer 1

see y = 4/7 x so y varies constantly with x and constant variation is 4/7 wrt x

Answer 2

To add onto what suvesh says, to see if y varies directly with x, you'll want to try to get y by itself. Since you have 4y = 7x, to get your y by itself, you divide both sides by 4.

Explanation: your y is being multiplied to be 4 times bigger than just a regular y, so to undo your "four times y", you divide by four to just have y.

So now you have y = 7/4 x

This means that for every 1 unit you go to the right or left, your y value changes by (7/4).

Please note that the fraction is actually 7/4; there was a small typo in the previous answer to you.

Answer 3

oohhh thank you!

Answer 4

No problemo!