Writing equations given 2 points on the line. Write the equation of the line that goes through the points (1, 6) and (3, -4) m = y₂ - y₁ x₂ - x₁ -4 -

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Presentation transcript:

Writing equations given 2 points on the line

Write the equation of the line that goes through the points (1, 6) and (3, -4) m = y₂ - y₁ x₂ - x₁ Y = mX + b -5 6 = (-5)(1) + b 6 = -5 + b = b Y = -5X + 11

Write the equation of the line that goes through the points (-1, 1) and (0, 3) m = y₂ - y₁ x₂ - x₁ – (-1) 2 1 Y = mX + b 2 3 = (2)(0) + b 3 = 0 + b -0 3 = b Y = 2X + 3

Write the equation of the line that goes through the points (-4, 3) and (8, 3) m = y₂ - y₁ x₂ - x₁ – (-4) 0 12 Y = mX + b 0 3 = (0)(8) + b 3 = 0 + b -0 3 = b Y = 0X + 3 Y = 3

Write the equation of the line that goes through an x intercept of 3 and a y intercept of -2 m = y₂ - y₁ x₂ - x₁ – Y = mX + b 0 = (⅔)(3) + b 0 = 2 + b = b Y = ⅔X - 2 (3, 0)(0, -2) 2 3