AnswersRecovery Content Sec Math 3 - Quarter 4 - 202627Domain and Range — Unit testQuestion 13
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Domain and Range — Unit test

Question 13 • Recovery Content Sec Math 3 - Quarter 4 - 2026/27

The quadratic regression equation y = –0.1x2 + 143.99x – 13,242.84 models expected company profits in terms of the number of pairs of shoes sold.Based on the regression equation, approximately how much profit can the company expect if it sells 400 pairs of shoes?

Answer
A
$28,400
B
$28,400
C
$41,600
D
$41,600
E
$44,300
F
$44,300
G
$60,400
H
$60,400

Explanation

Substitute x = 400 into the equation: y = −0.1(400²) + 143.99(400) − 13,242.84. This gives −16,000 + 57,596 − 13,242.84 = 28,353.16, or approximately $28,400. That matches choice A, $28,400.

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