Question

Suppose y varies directly with x, and y=24 when x =8. what is the value of y when x=10.


I learned how to do these kind of problems recently, but forget how to do them, and am currently unable to review the livelesson, so could someone plz help meh?

Answer 1

y varies directly with x means:

y = k ∙ x

if x = 8 and y = 24 then:

24 = k ∙ 8

Divide both sides by 8

3 = k

k = 3


y = 3 ∙ x

when x = 10 then:

y = 3 ∙ 10 = 30

Answer 2

Thank you a bunch, i got it now, thanks

Answer 3

Thank you so much Bosnian!