1-1 Relations and Functions An electrician charges $35 to make a trip to a job site. She charges an additional $50 per hour for two hours or less. If the job takes over two
hours, she charges $45 per hour and doesn't charge for the trip.
A mapping diagram for her rates from 1 to 4 hours, including half hours, is shown.
Domain
Range
1
85
1.5
2
2.5
- 110
135
112.5
157.5
3
3.5
4
+180
Is the relation between hours and dollars charged a function? Explain.
A. No: for any given number of hours, there is only one possible cost
B. No, for 135 there are two possible numbers of hours.
оо
C. Yes, for any given number of hours, there is only one possible cost.
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Amovie producer conducted a survey after the screening of his movie to find out how the film would be received by viewers from different age groups. the columns in the two-way table indicate the numbers of viewers who rated the film on a four-point scale: excellent, good, average, and poor. viewer's age group excellent good average poor marginal totals 16-25 52 42 12 7 113 26-35 33 50 5 9 97 36-45 58 12 28 34 132 which of these observations is supported by the data in the table? note: a rating of good or excellent means the audience liked the movie, while a rating of poor means the audience disliked the movie. a. the majority of the audience in the 26-35 age group disliked the movie. b. among those who liked the movie, the majority were in the oldest age group. c. among those who disliked the movie, the majority were in the 26-35 age group. d. the majority of the audience in the 16-25 age group liked the movie. e. the majority of the audience from all the age groups disliked the movie

In triangle abc, w is the centroid and be = 9. find bw. a. 3 b. 6 c. 9 d. 18