Find the regression line without using a calculator.
A. y = 0.43x + 4.98
B. y = 0.73x + 4.98
C. y = 0.53x + 4.88
D. y = 0.63x + 4.88
Answer: C
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Solve the problem.Find the area of a triangle with a base of 
and a height of 
A. (4x + 20) sq. in. B. (6x2 + 14x) sq. in. C. (4x2 + 20x) sq. in. D. (8x2 + 40x) sq. in.
Simplify.
÷ 2 ? 
? 
A. 
B. 
C. 0.097
D. 504
Subtract.95,007 - 15,656
A. 80,751 B. 79,251 C. 79,351 D. 79,751
Use Bayes' rule to find the indicated probability.Two stores sell a certain MP3 players. Store A has 34% of the sales, 5% of which are of defective items, and store B has 66% of the sales, 1% of which are of defective items. The difference in defective rates is due to different levels of pre-sale checking of the product. A person receives a defective item of this product as a gift. What is the probability it came from store B?
A. 0.275 B. 0.22 C. 0.5667 D. 0.7083