Can anyone me with with these two math problems? they are the only ones i can’t figure out. what is the quadratic regression equation for the data set? 6/100, 3/110, 10/50, 3/90, 5/120, 15/30, and 9/70a. y = -0.175x^2 + 3.786x - 121.119b. y = -0.175x^2 - 3.786x - 121.119c. y = -0.175x^2 + 3.786x + 121.119d. y = -0.175x^2 - 3.786x + 121.119what is the linear function equation that best fits the data set? (see comments for graph)a. y= 2x-2b. y= 4x-11c. y= 4x-2d. y=x-2

Step-by-step explanation:

1. The data generally goes down to the right, so the peak of the curve will be to the left of the y-axis. That means the x-coefficient will have the same sign as the x^2 coefficient (negative). The values near the y-axis are large positive values, so the y-intercept is positive. The equation with these characteristics is the last one:

... D. Y = -0.175x^2 - 3.786x + 121.119

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You can have your calculator or spreadsheet program write the regression equation for you. It will give you substantially the same result. (see the attachment)

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2. For estimating a regression line through data of this sort, it often works well to use the extreme data points: (1.5, 1) and (7.5, 13). If you draw a line through these points, you find that it passes through several other points on the graph, and it has a negative y-intercept. The slope of the line is ...

... (change in y)/(change in x) = (13 -1)/(7.5 -1.5) = 12/6 = 2

Only one of your answer choices has a slope of 2:

... A. Y = 2x-2

since your problem is x^4 = 81, what you have to undeo is the "to the fourth power" part.

the inverse (opposite operation) of "to the fourth power" is "to the fourth root".

  (x^4) ^ ¼   = 81 ^ ¼  

  81 = 3^4     so (3 ^ 4) ^ ¼   =   3 ^ 1   = 3

by hand: (3 ^ 4) ^ ¼   =   3 ^ (4 x ¼) = 3 ^ 1   = 3   (when you take a power to a power, multiply the exponents.)

or, do it by calculator. one way of finding the fourth root is to use ^ (1/4)

step-by-step explanation:

1. 3.4/4

2. 0.8/7

3. 0.5 x 3

4. 0.9 x 6

5. 10.8

6. 2.35

7. 0.567

8. 9.35

9. 0.02

10. 0.06

11. 0.16

12. 0.42

13. 0.63

14. 5.6

15. 8.1

16. 9.9

17. 0.28

18. 0.48

19. 0.27

20. 0.49

21. 0.45

22. 0.72

23. 0.9

24. 0.88

25. 0.75

26. 0.16

27. 0.328

28. 0.495

29. 0.72

30. 1.068