Solve the problem using your calculator.The paired data below consist of the costs of advertising (in thousands of dollars) and the number of products sold (in thousands). Use linear regression to find a linear function that predicts the number of products sold as a function of the cost of advertising.
A. y = -26.4 - 1.42x
B. y = 55.8 - 2.79x
C. y = 26.4 + 1.42x
D. y = 55.8 + 2.79x
Answer: D
Mathematics
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According to the 2000 U.S. Census, Cleveland, Ohio, has a population of 478,403, of whom 226,550 are male. If 500 citizens of Cleveland are selected at random, what is the probability that at least 230 will be male? (U.S. Bureau of the Census.)
What will be an ideal response?
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Find the perimeter. Use 3.14 for ? when needed.
A. 167.316 km B. 72.67 km C. 136.815 km D. 56.185 km
Mathematics
Perform the indicated multiplication.(0)(-30)
A. 1 B. 30 C. -30 D. 0
Mathematics
Determine the values of the variable for which the expression is defined as a real number.
Mathematics