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Test B Review, Calculator may be used, whichever is simpliest please show me thanks

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asked Dec 11, 2014 in PRECALCULUS by Baruchqa Pupil

2 Answers

0 votes

29).

Regression analysis investigates the relationship between variables; typically, the relationship between a dependent variable and one or more independent variables .

We use linear regression when we have a continuous outcome variable (Y) and we want to explore how Y changes as a function of one or more predictors (X).

So here in this case we use linear regression .

The equation for  linear regression is  y = a + b x .

Now we have to calculate values for a and b .

The table is shown below .

S.no

x

y

xy

1

- 2

8

- 16

4

64

2

1

5

5

1

25

3

3

1

3

9

1

4

7

- 4

- 28

49

16

From the above table, Σx = 9, Σy = 10, Σxy = - 36, Σx² = 63, Σy² = 106, number of samples n = 4.

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y = 5.579 - 1.368 x .

So the regression equation is y = - 1.368 x + 5.579.

Solution : Option (a) is the correct choice.

answered Dec 11, 2014 by lilly Expert
0 votes

30)

Given limit function is

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Solution : Option (c) is the Correct Choice.

answered Dec 11, 2014 by Shalom Scholar

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