A college student collected data from a number of his classmates. He recorded the number of hours each spent watching television and sleeping each night. The scatter plot shows the data he gathered and the line of best fit. Using technology, the student found the equation of the line of best fit is y = -x + 9.

Based on the equation for the line of best fit, how many hours of nightly sleep would a classmate likely get if she spent 6 hours watching television each night?

A.
15 hours
B.
3 hours
C.
7 hours
D.
6 hours

Using pert, adam munson was able to determine that the expected project completion time for the construction of a pleasure yacht is 21 months, and the project variance is 4. a) what is the probability that the project will be completed in 17 months? b) what is the probability that the project will be completed in 20 months? c) what is the probability that the project will be completed in 23 months? d) what is the probability that the project will be completed in 25 months? e) what is the due date that yields a 95% chance of completion?

Change negative exponents to positive, then solve

Our star pitcher, foster enlight, can throw a pitch so fast that it gets to the catcher’s mitt before it leaves foster’s fingers! if the team wins a game then the probability that foster was pitching is 0.8 but only if foster had at least one day’s rest since his last pitching assignment. if foster does not have a day off and the team still wins, the probability that foster was pitching drops by half of what it was on the previous day. if the team wins three games in succession from the toronto tachyons and foster pitched in game #2, what is the probability that he pitched in one or more of the other games? (assume that foster did not pitch on the day before the first game of this three game series.)