Answer:
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
