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Big Ideas Math Integrated I, 2016

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Big Ideas Math Integrated I, 2016 View details

2. Writing Equations in Point-Slope Form

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Exercise 1 Page 175

What is the form of an equation in point-slope form?

Slope: $- 2$
Point: $(- 5, 5)$

Practice makes perfect

Equations in point-slope form follow a specific format.

y - y_{1} = m (x - x_{1})

In this form,

m

is the slope of the line and

(x_{1}, y_{1})

is a point on the line. Let's modify the given equation just a little bit, without simplifying it.

y - 5 = - 2 (x + 5) \Leftrightarrow y - 5 = - 2 (x - (- 5))

Now, we can easily identify the slope and one of the points.

Slope : Point : - 2 (- 5, 5)

Subchapter links

Communicate Your Answer p.171

Monitoring Progress p.172-174

Exercises p.175-176