is this nonlinear function, nonlinear not a function, linear function or linear not a function?

Question

x y
-2 -7
-1 -4
0 -1
1 2
2 5

Answer 1

The given table of values represents a linear function. Each x-value is associated with a consistent y-value increment of 3. Therefore, the function can be expressed as y = 3x - 5.