Question

http://www.usatestprep.com/modules/gallery/files/11/1188/1188.gif
Which equation best represents the line of best fit for the scatterplot?
A) y = x + 6
B) y = 2x + 6
C) y = -x + 6
D) y = -2x + 6

Answer 1

@ltrout

Answer 2

So what you would usually do is choose two points that would best fit the line and then put them into this formula (y2-y1)/(x2-x1). The points I would choose are (-1,5) and (3,3).

Answer 3

ok thats what i thouht

Answer 4

now what do i do?

Answer 5

Hmm. None of the answer choices are there. One sec.

Answer 6

Oh. Silly mistake. The points should be (-1, 7) and (3,3). Now just solve the equation
(3-7)/(3+1) = -1.

So the line so far is y = -x + b and you need to find a B. But since there's only one equation with -x I'm sure you know the answer ;)

Answer 7

just checking its c

Answer 8

Yep.

Answer 9

I'll brb for a bit. Lemme do some school work then I'll answer questions.