SOLUTION: An equation of the line that contains the origin and the point (1, 2) is?

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: An equation of the line that contains the origin and the point (1, 2) is?      Log On


   

Question 957335: An equation of the line that contains the origin and the point (1, 2) is?
Answer by macston(5194) About Me  (Show Source):
You can put this solution on YOUR website!
Two points: (0,0),(1,2)
m=%282-0%29%2F%281-0%29 The slope is 2
y=mx+b
y=2x+b Plug in value,solve for b:
2=2(1)+b Subtract 2 from each side.
0=b
.
EQUATION: y=2x
. CHECK:
Through (0,0)
y=2x
0=2(0)
0=0
.
Through (1,2)
y=2x
2=2(1)
2=2