Find the average rate of change of f(x)= 4x^2 − 6 on the interval [3,t]. Your answer will be an expression involving t.

Idon’t know what the answer is i wish i could

This is what i found “an explicit formula designates the nth term of the sequence, as an expression of n (where n = the term's location). it defines the sequence as a formula in terms of n. this example is an arithmetic sequence(the same number, 5, is added to each term to get to the next term).” i hope this you for what your looking for. can you plz mark me brainliest?