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