SOLUTION: which equation is represented by the following table of values? x: 5 7 9 y: 6 12 18 a. y=3x-9 b. x=3y-9 c. y=9x-3 d. x=9y-3

Algebra ->  Absolute-value -> SOLUTION: which equation is represented by the following table of values? x: 5 7 9 y: 6 12 18 a. y=3x-9 b. x=3y-9 c. y=9x-3 d. x=9y-3      Log On


   

Question 800879: which equation is represented by the following table of values?
x: 5 7 9
y: 6 12 18

a. y=3x-9
b. x=3y-9
c. y=9x-3
d. x=9y-3
Answer by thepianist25(8) About Me  (Show Source):
You can put this solution on YOUR website!
To solve this question, you will need to substitute in the given (x,y) points in each of the equations to see which one satisfies all possible given points.
The (x,y) points are these:
(5, 6) (7, 12) (9, 18)
The first equation is y = 3x - 9
So, we will try each set of points.
Set 1:
%286%29+=+3%285%29+-+9
6+=+15+-+9
6+=+6
Set 2:
%2812%29+=+3%287%29+-+9
12+=+21+-+9
12+=+12
Set 3:
%2818%29+=+3%289%29+-+9
18+=+27+-+9
18+=+18
You could try the same thing for each of the other equations, but no other one satisfies these sets of points. So the correct answer is choice A.