Help me pls what is the rate of change and the function​

Step-by-step explanation:

Rate of change of a function between x = b and x = a,

Rate of change =

From the given table,

Rate of change of the given function between x = 3 and x = 5,

f(5) = -26

f(3) = -2

Rate of change =

                          = -12

Since, rate of change for the given function is constant, function is a linear function.