Question

The graph and accompanying table shown here display 12 observations of a pair of variables (x, y).

The variables x and y are positively correlated, with a correlation coefficient of r = 0.97.

You estimate the slope of the least squares regression line, y = a + bx, for these data values to be b = 2. What is the y-intercept, a, of the least squares regression line? Round your answer to the nearest tenth.

x 3 6 8 9 9 13 15 18 20 21 23 23
y 9 17 15 15 18 24 29 36 43 39 46 55

Answer 1

@ganeshie8 @phi @radar @Preetha @mathslover @AravindG @ajprincess

Answer 2

@hlee0919 @amistre64 @BostonBlue @marsss

Answer 3

The intercept is 0.13. The slope is 2, so the equation is y=ax+b, y=2x +.13

Answer 4

You can also simply use the linreg function to find the equation by inputting the 12 pairs of points

Answer 5

So would my answer be 3?

Answer 6

Wait, that doesn't make sense.... I'm confused. @hlee0919

Answer 7

@Compassionate

Answer 8

Oh - gawd. I have no idea how to do this type of mathematics...

Here. Go to http://answers.yahoo.com/
(You need a Yahoo! account) and ask your question there

I go ChaCha Answers or Weegy, you might have luck there.

Keep bumping this until someone sees it?

Answer 9

Thank you!!

Answer 10

@him1618

Answer 11

@Ell

Answer 12

You should have luck on Yahoo Answers. Go ahead and ask it on there.

Answer 13

@Abarnett might be able to help(:

Answer 14

@Abarnett ?! :D

Answer 15

help D: