Let the unknown number be x.
6x + 8 = 9x
-3x = -8
x = 8/3
The number is 8/3 or 2 2/3
7 = 3/4 (3) + c
28 = 9 + 4c
4c = - 19
c = - 19/4
y = 3/4x - 19/4
5 = 3/4x - 19/4
3/4x = 39/4
x = 13
Answer:
6
Step-by-step explanation:
Use the slope formula:

Picking x = 2 and x = 4 as my two points (since the interval is 2 ≤ x ≤ 4), we get:

So, the BEST estimate of the average rate of change for the function given in the table is 6.
Ratio= 20/21 as you can see calculate from diagram hope it helps