State whether each function is a linear function. Explain.

1. y = 3x

2. y = - 2+5x

3. 2x + y = 10

4. f (x) = 4x^2

5. - 3/x + y = 15

6. x + y + 8

The answer is below

Step-by-step explanation:

1. y = 3x is a linear function because it doesn't have any power

2. y = - 2+5x is a linear function because it doesn't have any power

3. 2x + y = 10 is a linear function because it doesn't have any power

4. f (x) = 4x^2 it isn't a linear function because x is elevated to a power

5. - 3/x + y = 15 is a linear function because it doesn't have any power

6. x + y + 8 is a linear function because it doesn't have any power