Slopes of Lines. Find the Slope of a Line A. Find the slope of the line. Substitute (–3, 7) for (x 1, y 1 ) and (–1, –1) for (x 2, y 2 ). Answer:–4.

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Presentation transcript:

Slopes of Lines

Find the Slope of a Line A. Find the slope of the line. Substitute (–3, 7) for (x 1, y 1 ) and (–1, –1) for (x 2, y 2 ). Answer:–4 Slope formula

Find the Slope of a Line B. Find the slope of the line. Substitute (0, 4) for (x 1, y 1 ) and (0, –3) for (x 2, y 2 ). Answer:The slope is undefined. Slope formula

Find the Slope of a Line C. Find the slope of the line. Answer: Slope formula Substitute (–2, –5) for (x 1, y 1 ) and (6, 2) for (x 2, y 2 ).

Find the Slope of a Line D. Find the slope of the line. Answer:0 Slope formula Substitute (–2, –1) for (x 1, y 1 ) and (6, –1) for (x 2, y 2 ).

A. B. C. D. A. Find the slope of the line.

A.0 B.undefined C.7 D. B. Find the slope of the line.

A. B. C.–2 D.2 C. Find the slope of the line.

A.0 B.undefined C.3 D. D. Find the slope of the line.

Use Slope as Rate of Change RECREATION In 2000, the annual sales for one manufacturer of camping equipment was $48.9 million. In 2005, the annual sales were $85.9 million. If sales increase at the same rate, what will be the total sales in 2015?

Determine Line Relationships Determine whether and are parallel, perpendicular, or neither for F(1, –3), G(–2, –1), H(5, 0), and J(6, 3).

A.parallel B.perpendicular C.neither Determine whether AB and CD are parallel, perpendicular, or neither for A(–2, –1), B(4, 5), C(6, 1), and D(9, –2)

Use Slope to Graph a Line First, find the slope of. Slope formula Graph the line that contains Q(5, 1) and is parallel to MN with M(–2, 4) and N(2, 1).

Graph the line that contains R(2, –1) and is parallel to OP with O(1, 6) and P(–3, 1).