Data regarding fuel efficiency of an airliner were collected. the graph shows the correlation between the distance traveled (in thousands of miles) and the altitude (in thousands of feet):
image of a scatter plot with distance traveled on the x axis and altitude on the y axis with (2,2), (3,10), (5,15), (10,20), (15,15), (18,10), and (19,2)
estimate the average rate of change from x = 15 to x = 19.
a. -3.25
b. 4
c. -4
d. -0.31

"you know, playing tennis is healthier than watching a tennis match on television," katya remarked to her couch potato brother. in this sentence, healthier is a/an a. superlative. b. comparative. c. positive form. d. adverb.

Name the most appropriate metric unit for each measurement

The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally distributed with a mean of 1252 chips and standard deviation 129 chips. (a) what is the probability that a randomly selected bag contains between 1100 and 1500 chocolate chips, inclusive? (b) what is the probability that a randomly selected bag contains fewer than 1125 chocolate chips? (c) what proportion of bags contains more than 1225 chocolate chips? (d) what is the percentile rank of a bag that contains 1425 chocolate chips?