Question

Select all correct answers

Answer 1

1, 2, 4

Explanation:

Consider all options:

1.
`3x+9y=54`

Express y:

`9y=54-3x\\ \\y=6-(1)/(3)x`

This is the equation in the form

`y=mx+b,`

so this is a linear function.

2.
`y=(x)/(3)`

can be rewritten as

`y=(1)/(3)x+0`

This is the equation in the form

`y=mx+b,`

so this is a linear function.

3.
`y=x(2x-3)`

This function is equivalent to the function

`y=2x^2-3x`

This is quadratic, not linear function.

4.
`y=0.4x-2.2`

This is the equation in the form

`y=mx+b,`

so this is a linear function.

5.
`(2)/(x)-8=y`

This is not linear function, because x is in the denominator.

6.
`y=√(4x)`

This is not linear function because there is a squer root of x.