SOLUTION: Which of the following equations describes the line shown below? Check all that apply. (4,6) (-1,-4) A. y = 2x - 1 B. y - 4 = 2(x - 1) C. y - 6 = 2(x

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Question 275881: Which of the following equations describes the line shown below? Check all that apply.
(4,6) (-1,-4)
A. y = 2x - 1
B. y - 4 = 2(x - 1)
C. y - 6 = 2(x - 4)
D. y = 2x - 2
E. y + 6 = 2(x + 4)
F. y + 4 = 2(x + 1) i tried this and the only one i got was b...but how do i know when its plus or minus on the equation???
Answer by solver91311(24713) (Show Source):
You can put this solution on YOUR website!

Use the two point form of the equation of a line:

where and are the coordinates of the given points.

Since which point you choose for #1 and which for #2 doesn't matter, you either get:

Which could also be written:

Or, if you swap the points:

Which can also be written:

Looks like C, D, and F to me.

John

SOLUTION: Which of the following equations describes the line shown below? Check all that apply. (4,6) (-1,-4) A. y = 2x - 1 B. y - 4 = 2(x - 1) C. y - 6 = 2(x - 4) D.