SOLUTION: Which equation is the BEST fit for the data in the graph? A. y = x + 2 B, y = 2x + 1 C. y = x - 1/2 D. y = 1/2v - 1 http://www.usatestprep.com/modules/gallery/fil

Algebra ->  Linear-equations -> SOLUTION: Which equation is the BEST fit for the data in the graph? A. y = x + 2 B, y = 2x + 1 C. y = x - 1/2 D. y = 1/2v - 1 http://www.usatestprep.com/modules/gallery/fil      Log On


   

Question 937092:
Which equation is the BEST fit for the data in the graph?
A. y = x + 2
B, y = 2x + 1
C. y = x - 1/2
D. y = 1/2v - 1
http://www.usatestprep.com/modules/gallery/files/30/3076/3076.png
Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!

these three points lie on same line: (3,7), (4,9), (5,11)
use them to see which equation they satisfy
A.
y+=+x+%2B+2+ plug in (3,7)
7+=+3+%2B+2+
7+%3C%3E+5 ...not solution
y+=+x+%2B+2 plug in (4,9)
9+=+4+%2B+2+
9+%3C%3E6+...not solution
y+=+x+%2B+2 plug in (5,11)
11+=+5+%2B+2+
11+%3C%3E7 ...not solution
B,
y+=+2x+%2B+1 plug in (3,7)
7=+2%2A3+%2B+1
7=+6%2B+1
7=+7........this is a solution
y+=+2x+%2B+1 plug in (4,9)
9=+2%2A4+%2B+1
9=+8%2B+1
9=+9........this is a solution
y+=+2x+%2B+1 plug in (5,11)
11=+2%2A5+%2B+1
11=+10%2B+1
11=+11........this is a solution
so, options C. y+=+x+-+1%2F2+ and D. y+=%28+1%2F2%29x-+1 we can disregard because B. y+=+2x+%2B+1 is your answer