Quizlet Algebra Unit 5

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  1. -1: the product of the slopes of two perpendicular lines
  2. constant of variation: what the k is in the equation y = kx
  3. direct variation: y = kx
  4. horizontal line: appears in the form y = a where a is any number
  5. parallel lines: lines that have the same slope
  6. perpendicular lines: the slopes of these lines are negative reciprocals of each other (ie. m and -1/m)
  7. point-slope form: y - y₁ = m(x - x₁)
  8. rate of change: another name for slope, usually in reference to speed
  9. slope: (y₂ - y₁)/(x₂ - x₁)
  10. slope: rise over run (also known as m)
  11. slope-intercept form: y = mx + b
  12. standard form: Ax + By = C
  13. vertical line: appears in the form x = a where a is any number
  14. x-intercept: point where the line crosses the x-axis
  15. y-intercept: point where a line crosses the y-axis (also known as b)