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vaieri [72.5K]
3 years ago
14

) After the first exam in a large course, the professor surveyed 14 randomly selected students to determine the relation between

the amount of time they spent studying for the exam and exam score.  She found that a linear relation exists between the two variables.  The least-squares regression line that describes this relation is .
          (a) Predict the exam score of a student who studied 2 hours.

          (b) Write an interpretation for the slope. (Refer to Lesson 12.2 for this.)

          (c) Write an interpretation for the y-intercept, if appropriate. If not appropriate, explain why not. (Again, refer to Lesson 12.2 for this.)

 

2) In what scenarios would it not make sense to interpret the y-intercept?
Mathematics
1 answer:
olga_2 [115]3 years ago
3 0

C would be your answer, hope this helps!!

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evablogger [386]

If the rate of change (ROC) of the function is quadratic, then the function type is cubic

<h3>What is rate of change?</h3>

The rate of change of a function is the rate at which the output values change over the input value

The rate of change of a function is one degree less than the actual function

This means that, a cubic function will have a quadratic rate of change

Hence, the correct option is (d)

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4 0
2 years ago
Students sold raffle tickets to raise money for a field trip. The first 20 tickets cost $4 each. To sell more tickets, they lowe
saveliy_v [14]

Answer:

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3 years ago
Rachel earned $23,750 and paid a FICA tax of 7.65%. How much FICA tax did she pay?
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Rachel needs to pay $1816.88 for FICA tax
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7 0
3 years ago
A trader bought x mangoes at the rate of 4 mangoes for 10 naira, five of the mangoes were bad so he sold the remaining at the ra
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Answer:

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The cost of the x mangoes was ...

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The revenue from the sale of mangoes was ...

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The profit is the difference between revenue and cost:

  10 = r - c = 20(x -5)/5 -10(x/4) = 1.5x -20 . . . . substitute and simplify

  30 = 1.5x . . . . . add 20

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The trader bought 20 mangoes.

_____

<em>Check</em>

He paid 20(10/4) = 50 naira. He sold the 15 good mangoes for 20/5(15) = 60 naira, so made a 10 naira profit.

8 0
3 years ago
What is 123+3321= ??
Vedmedyk [2.9K]

Answer:

3444

Step-by-step explanation:

3 0
3 years ago
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