Writing Linear Equations

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Presentation transcript:

Writing Linear Equations Writing Linear Equations Given Two Points Section 5.3 Writing Linear Equations Given Two Points Goal: Write an equation of a line given two points on the line.

Writing Linear Equations Given Two Points

(5, –6) ; (3, –2) (5, –6) y – y1 = m(x – x1) y – (–6) = –2(x – 5) How to write the equation of a line given two points: (5, –6) ; (3, –2) y – y1 = m(x – x1) y – (–2) = –2(x – 3) y + 2 = –2x + 6 –2 –2 y = –2x + 4 (5, –6) y – (–6) = –2(x – 5) y + 6 = –2x + 10 –6 –6 y = –2x + 4

(1, 1) ; (7, 4) y – y1 = m(x – x1) y – 1 = (x – 1) y – 1 = x – +1 +1 y = x +

How to write the equation of Horizontal and Vertical Lines: Write the equation of a horizontal line that passes through (6, –3) y = # y = – 3 Write the equation of a vertical line that passes through (–2, 4) x = # x = – 2

Homework Assignment #18 5.3 Practice A Sheet