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vaieri [72.5K]
4 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]4 years ago
3 0

C would be your answer, hope this helps!!

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Solve: |x+2|−1≥5. Write your solution in interval notation.
AlekseyPX

nswer:

Step-by-step explanat

|x+2| - 1 ≥ 5

  |x+2|  ≥ 5+1

 |x+2|  ≥ 6

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Ugo [173]

Answer:

y=-3.2\\\\y=-2.2\\\\y=-1.8

Step-by-step explanation:

Insert the given x values for the given equation to find the corresponding y coordinate:

y=0.2x-2

x:-6,-1,1

Insert -6:

y=0.2(-6)-2

Simplify multiplication (when multiplying a negative and a positive, the result will always be negative):

y=-1.2-2

Simplify (when subtracting from a negative number, add the values, but keep the negative symbol):

y=-3.2

Insert -1:

y=0.2(-1)-2\\\\y=-0.2-2\\\\y=-2.2

Insert 1:

y=0.2(1)-2\\\\y=0.2-2\\\\y=-1.8

:Done

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Answer: 44.4%

Step-by-step explanation:

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You are given f(x)=-5x2+10x-5
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Step-by-step explanation:

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