The average rate of change of a function between x = a to x = b is f(b) - f(a) / (b - a). Now use this formula to find the rate of change of the function f(x) = x^2 between x = 4 to x = 8 *
Choose a
1) 8
2) 4
3) 80/12
4) 12

4) 12

Step-by-step explanation:

f(4) = 4² = 16

f(8) = 8² = 64

(64 - 16)/(8 - 4)

48/4

12

the equation for this situation is y=122+45. to solve the equation you would add 45 and 122 to get a total of 167lbs. in conclusion, grace's weight eight weeks ago was 167lbs.  

can you post the graph?