Question

Which of the following represents a non-proportional function? X -5 y -5.5 -1.5 -1 4.5 4 8 7.5 o {(-1, 1), (2,-2), (3, -3), (5, -5)} y = 2

Answer 1

A proportional function has the form:

`y\text{ = k }\cdot\text{ x}`

where k is a constant.

So, option 1 it is a proportional function, because it's a straight line crossing from zero.

Option 2 is non-proportional function because:

`(-5.5)/(-5)\\e\text{ }(-1)/(-1.5)`

Option 3 is proportional function:

`(1)/(-1)=(-2)/(2)=(-3)/(3)=(-5)/(5)`

Option 4 is proportional function, because has the form I mention above.

The correct answer is Option 2.