Interpret the meaning of the slope and the y-intercept of the equation in terms of the conditions stated in the problem.The cost, in dollars, of cellular phone service with Econo-phone is given by 
where x is the number of minutes used in one month.
A. 17.25 signifies the total phone bill, and 0.51 signifies the number of minutes used.
B. 17.25 signifies the cost per minute, and 0.51 signifies the monthly service charge.
C. 0.51 signifies the hourly phone rent, and 17.25 signifies the cost of the hardware.
D. 0.51 signifies the cost per minute, and 17.25 signifies the monthly service charge.
Answer: D
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A. - 
B. 7?
C. - 
D. 
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A. $1.00 B. $0.75 C. $1.75 D. $50
Following are forecasts of worldwide annual cell phone handset sales.
Yearx 3 5 7Salesy(Millions) 500 600 800?
(
represents 2003)Obtain the associated regression line. (Round coefficients to 2 decimal places if necessary.) Use your regression equation to project the 2008 sales.
?
A. 842.33 B. 869.33 C. 878.33 D. 858.33 E. 838.33
Write the decimal as a percent.0.15
A. 0.015% B. 15% C. 1.5% D. 150%