Question 10 The function f(x) = -5x* + 17x + 21 models the predicted sales of a pen after x price increases.
a) Use the function to complete the Predicted Sales column. The x-values are in the first column.
b) Calculate the residuals. Explain how you found at least one of the answers.
Actual Predicted
Residual
Sales
Sales
0
22
1
33
2
36
3
28

Answer is in the file below

cutt.ly/tz3yDpb

step-by-step explanation:

y = | -2(-2) |     →     y = | 4 |     →     y = 4       ⇒   (-2, 4)

y = | -2(-1) |     →     y = | 2 |     →       y =   2       ⇒   (-1, 2)    

y = | -2(0) |     →     y = | 0 |     →       y = 0         ⇒   (0, 0)

y = | -2(1) |   c →     y = | -2 |     →     y =   2         ⇒   (1, 2)    

y = | -2(2) |     →     y = | - 4 |     →     y =   4         ⇒   (2, 4)