If y varies inversely with x, and y = 5 when x = 7, what is the value of y when x = 4?

genestesya

genestesya

Answered question

2022-09-05

If y varies inversely with x, and y = 5 when x = 7, what is the value of y when x = 4?

Answer & Explanation

Konner Parker

Konner Parker

Beginner2022-09-06Added 12 answers

An inverse variation: y = k x
We are given y and x. We need to solve for k so we can find y when x equals 4.
5 = k 7
7 1 5 = k 7 7 1
35=k
We found what k is, so know we can make our inverse variation equation.
y = 35 x
Now let's plug in 4 for x to find y.
y = 35 4
y = 8 3 4

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