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

a)(x-2)^2+(y-1)^2=9

step-by-step explanation:

(picture explains)

9x