What is the average rate of change for ƒ (x) = - 3^x + 79 over the interval 2 ≤ x ≤ 4?

The average is 124

Step-by-step explanation:

When x=2 substitute into the equation given above

-3^2+79

9+79=88 ... (1)

When x=4

-3^4+79

81+79=160 (2)

Average of (1) and (2)

160+88/2

=248/2

=124

Therefore the average rate is 124