Nikki gathered data about the length of time she spent listening to the radio and the number of commercials she heard. She organized the data in a scatter plot, where x represents the minutes spent listening and y represents the number of commercials. Then she used the graphing tool to find the equation of the line of best fit: y = 0.338x - 1.387. Based on the line of best fit, for approximately how many minutes will Nikki need to listen to the radio to hear 20 commercials?

A=10

b=55

c=63

d=72

Question

Christine Harper

Mathematics

4 April, 02:34

Nikki gathered data about the length of time she spent listening to the radio and the number of commercials she heard. She organized the data in a scatter plot, where x represents the minutes spent listening and y represents the number of commercials. Then she used the graphing tool to find the equation of the line of best fit: y = 0.338x - 1.387. Based on the line of best fit, for approximately how many minutes will Nikki need to listen to the radio to hear 20 commercials?

A=10

b=55

c=63

d=72

+5

Answers (1)

Know the Answer?

Addison Lopez · Answer 1

Option C

63

Step-by-step explanation:

Using the given equation y = 0.338x - 1.387 and since you're given the the number of commercials, you substitute this for y hence

20 = 0.338x - 1.3877

20+1.3877=0.338x

0.338x=21.3877

x=21.3877/0.338=63.27514793

Rounding off, x=63. / the question says x represents the minutes spent hence the answer is 63