If y = 45 when x = 180, what is the value of y when x = 80?

Question

If y = 45 when x =

180, what is the value of y when x = 80?

Answer 1

If y = 45 when x = 180, what is the value of y when x = 80?

-if y = 45 and x = 180, then that can be setup as x/y = 180/45. this value is going to give you 4

-so now you know that the ratio of x to y is 4. so if x = 80, then y must be 1/4 of 80, which is 20

-therefore when x = 80 y = 20

Answer 2

Hey Halsey!

So this problem is asking you to solve for y using the proportions of x and y. So if when x is 180, y is 45, that means there is a ratio between x and y of 4:1 (we divide 180 by 45 to get 4, so x is 4x greater). That means y is 1/4 the value of x. So if x is 80, to get y we have to divide by 4 to get 20.