Question

Which equation represents a proportional relationship that has a constant proportionality equal to 0.7

Y/x=7/10

Y/x=1/7

XY=7/10

XY=1/7

Answer 1

first option

Explanation:

The equation representing a proportional relationship is

y = kx ← k is the constant of proportion

Here k = 0.7, thus

y = 0.7x ← is the required equation

Given

`(y)/(x)` =
`(7)/(10)` ( cross- multiply )

10y = 7x ( divide both sides by 10 )

y =
`(7)/(10)` x = 0.7 x ← the required equation