Question

The quantities x and y are proportional. X = 4, 5, 10. Y = 10, 12.5, 25. Find the constant of proportionality (r) in the equation y = rx.

Answer 1

2.5

Explanation:

khan

Answer 2

r = 2.5

Explanation:

given the equation y = rx ← r is the constant of proportionality

then r =
`(y)/(x)`

from the given values of x and y

r =
`(25)/(10)` =
`(12.5)/(5)` =
`(10)/(4)` = 2.5