SOLUTION: Find the missing values that solve this equation. y = 3x (0, ____) (-1,____) (7,____) I don't understand how to get the missing values.

Algebra ->  Coordinate Systems and Linear Equations -> SOLUTION: Find the missing values that solve this equation. y = 3x (0, ____) (-1,____) (7,____) I don't understand how to get the missing values.      Log On


   

Question 61709: Find the missing values that solve this equation.
y = 3x
(0, ____) (-1,____) (7,____)

I don't understand how to get the missing values.
Found 3 solutions by josmiceli, stanbon, jai_kos:
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
What they are asking is to find three
different points on the line y+=+3x
The points are in the form (x,y)
One at a time
(0,_)
y+=+3%2A0
y+=+0
(0, 0) answer
------------
(-1,_)
y+=+3%2A%28-1%29
y+=+-3
(-1, -3) answer
------------
(7,_)
y+=+3%2A7
y+=+21
(7, 21) answer

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Find the missing values that solve this equation.
y = 3x
(0, ____) (-1,____) (7,____)
--------
The equation tells you the y-value is three times the x-value.
(0,0), (-1,-3),(7,21)
Cheers,
Stan H.

Answer by jai_kos(139) About Me  (Show Source):
You can put this solution on YOUR website!
Given y = 3x --->(1)
The point is represented by (x ,y)
So the point (0 , -------)
Put x = 0 in the equation(1), we get
y = 0.
Therefore the missing values, (0, 0)
Now again put x = -1, we get
y = 3(-1) = -3
Therefore the values are (-1 , -3)

Now again put x = 7 in equation(1), we get
y =3(7) = 21
Therfore the value are (7,21)

Hence whenever you are given an equation and the first value "x", just substitute to get the missing value.
(0, 0) (-1, -3) (7, 21)