www.iTutoring.com -‐ NOTES Determining the Equation of a Line Given Two Points Name _________________________________ Date ___________________ Period _______ Given two points (x1,y1) and (x2,y2), the Slope between these points is y2 – y1 m= x2 – x1 Point-Slope Form of a Line slope y – y1 = m(x – x1) (x,y) Point To determine the equation of a line, you need an (x,y) point and a slope. m= y2 – y1 x2 – x1 y – y1 = m(x – x1) (1,5) and (4,-1) To determine the equation of a line, you need an (x,y) point and a slope. m= y2 – y1 x2 – x1 y – y1 = m(x – x1) (-3,4) and (-1,-4) © iTutoring.com Determining the Equation of a Line Given Two Points Pg. 2 To determine the equation of a line, you need an (x,y) point and a slope. m= y2 – y1 x2 – x1 y – y1 = m(x – x1) (-1,2) and (0,5) To determine the equation of a line, you need an (x,y) point and a slope. m= y2 – y1 x2 – x1 y – y1 = m(x – x1) (8,-2) and (12,-1) © iTutoring.com Determining the Equation of a Line Given Two Points Pg. 3 To determine the equation of a line, you need an (x,y) point and a slope. m= y2 – y1 x2 – x1 y – y1 = m(x – x1) (2,6) and (6,4) To determine the equation of a line, you need an (x,y) point and a slope. (x,y) Point: m= y2 – y1 x2 – x1 y – y1 = m(x – x1) point-slope form Solve for y y = mx + b slope-intercept form © iTutoring.com Determining the Equation of a Line Given Two Points Pg. 4
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