SOLUTION: what is the equation for the coordinates (1,2) and (2,4)

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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