uc133953
Answered

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Keiko surveyed people with cell phones.
Age in years=a
Texts they send per day=t
He drew a best-fit line and determined its equation.

Student
Keiko
Trend Line
t -1.63a + 92.14

Evaluate how many texts a 15 year old would send each day according to Keiko's trend line equation.

Sagot :

Using the line of best fit, the amount of texts a 15-year old would send in a day is of 67.69.

What does the line of best fit gives?

It gives the expected number of texts a person of an age a would send in a day, according to the following function:

t = -1.63a + 92.14.

For a person that is 15 years old, we have that a = 15, hence the expected number is given by:

t = -1.63 x 15 + 92.14 = 67.69 texts.

More can be learned about line of best-fit at https://brainly.com/question/17261411

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