Question 68682: what is the equation for the coordinates (1,2) and (2,4)
Answer by rmromero(383)   (Show Source):
You can put this solution on YOUR website! what is the equation for the coordinates (1,2) and (2,4)
Two points determine a line. Given you point you can also find the equation of the line.
1. Find the slope of the line through two points (1,2) and (2,4).
 ,
Let (x1,y1) = (1,2)
(x2,y2) = (2,4)
 or 2
2.Using slope - intercept form, find y - intercept
 , Choose one point of the line (1,2) and substitute it to the equation including the slope to find the b or y-intercept.
m = 2, x = 1 and y = 2
2 = 2(1) + b
2 - 2 = b
0 = b
so the slope-intercept form of the equation is y = 2x + 0
or y = 2x
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