Alg- What is the equation of a line

Algebra
Tutor: None Selected Time limit: 1 Day

What is the equation of a line that contains the points (3,5) and (7,13)? Show complete process to solve.

Dec 10th, 2014

Slope of line thru 2 points  = ( y2 - y1 ) / ( x2 - x1 )

=> Slope = ( 13 - 5 ) / ( 7 - 3 ) = 8 / 4 = 2

Equation of line thru 2 points is :

( y - y1 ) = Slope * ( x - x1 )

=> y - 5  = 2 ( x -  3 )

Answer: y = 2x - 1


Dec 10th, 2014

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