Presentation 2

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Presentation 2

  1. 1. + Slope-intercept form! Ms. Hopkins
  2. 2. + Slope-intercept form The slope Y-intercept This equation is called slope-intercept form because it includes the slope and the y-intercept.
  3. 3. + Point-slope form slope X and Y components of a pointWhen given a point and a slope, use point-slope form to write an equation for thisthe line containing that point and having that slope.
  4. 4. + When given slope & y-intercept  When given the slope and the y-intercept of a line, plug those numbers into slope-intercept form in order to find the equation for that line. A line has a slope of 2 and a y-intercept of 5. The equation for this line in slope-intercept form is
  5. 5. + When given a graph  When given a graph of a line, to find the equation of that line in slope-intercept form, determine the slope and the y-intercept, then plug those numbers in to the slope-intercept form. Slope= rise = 1 run 2Y-intercept =3 Rise = 1 Run =2
  6. 6. + When given two points  When given two points, find the slope of the line between those two points and then use point-slope form to find the equation in slope-intercept form. (3, -5) and (4, -1) Slope = y2-y1 = -1 – (-5) = 4 = 4 x2-x1 = 4 - 3 1
  7. 7. + When given two points (cont.) (3, -5) and (4, -1) Slope = 4 Plug the one of the points and the slope into the point-slope form. Y-(-1) = 4(x-4)
  8. 8. + When given two points (cont.) Now, just solve the equation for y and the equation will be in slope- intercept form. Y-(-1) = 4(x-4) Y+1 = 4x-16 -1 -1 y = 4x-17

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