Question

Which of the linear equations BEST represents the line of best fit for the scatterplot?
A) y = x + 1
B) y = 2x - 1
C) y = 1/2x - 1
D) y = -1/2x - 1
http://www.usatestprep.com/modules/gallery/files/12/1225/1225.gif

Answer 1

the answer is D

Answer 2

medal?

Answer 3

how is it d

Answer 4

Idk If this will help or not
http://mathbits.com/MathBits/TISection/Statistics1/LineFit.htm

Answer 5

What is the y-intercept ?

Answer 6

^-1

Answer 7

@heart_offire did the website help?

Answer 8

Yes

So which equation(s) have a y -intercept of -1?

A) y = x + 1
B) y = 2x - 1
C) y = 1/2x - 1
D) y = -1/2x - 1

Answer 9

b c and d

Answer 10

Yes

Now look at the slope of the points. Is the slope positive or negative?

Answer 11

negative

Answer 12

oh now i see why its D

Answer 13

Yes

Which of these equations have a negative slope?

B) y = 2x - 1
C) y = 1/2x - 1
D) y = -1/2x - 1

Answer 14

d

Answer 15

Yes

You have your answer. Also look at the rise over run of the dots. You will see that they go up 1 for every 2 they move over, and since it is a negative slope m = -1/2

Very good.