Question

Y is inversely proportional to x when x =3, y = 8 work out the value of y when x = 8

Answer 1

Inversely Proportional

y is inversely proportional to x when x =3, y = 8 work out the value of y when x = 8

y is inversely proportional to x: yx = k, such k is constant

Did you know?

• Inversely proportional is also known as inverse variation.

Given:

• x = 3
• y = 8

To determine the constant of variation, substitute the first two given values to the equation of variation.

• yx = k
• (8)(3) = k
• 24 = k

To determine the value of y, substitute the second given value of x including the constant of variation.

• x = 8, y = ?
• yx = 24
• 8y = 24
• y = 24/8
• y = 3

Answer:

• The value of y is 3.

Wxndy~~