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Splash Screen. Five-Minute Check (over Lesson 3–2) CCSS Then/Now New Vocabulary Key Concept: Slope of a Line Example 1: Find the Slope of a Line Concept Summary: Classifying Slopes Example 2: Real-World Example: Use Slope as Rate of Change Postulates: Parallel and Perpendicular Lines

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**Five-Minute Check (over Lesson 3–2)**CCSS Then/Now New Vocabulary Key Concept: Slope of a Line Example 1: Find the Slope of a Line Concept Summary: Classifying Slopes Example 2: Real-World Example: Use Slope as Rate of Change Postulates: Parallel and Perpendicular Lines Example 3: Determine Line Relationships Example 4: Use Slope to Graph a Line Lesson Menu**In the figure, m4 = 146. Find the measure of 2.**A. 24 B. 34 C. 146 D. 156 5-Minute Check 1**In the figure, m4 = 146. Find the measure of 7.**A. 24 B. 34 C. 146 D. 156 5-Minute Check 2**In the figure, m4 = 146. Find the measure of 10.**A. 160 B. 146 C. 56 D. 34 5-Minute Check 3**In the figure, m4 = 146. Find the measure of 11.**A. 180 B. 160 C. 52 D. 34 5-Minute Check 4**Find m11 + m6.**A. 180 B. 146 C. 68 D. 34 5-Minute Check 5**In the map shown, 5th Street and 7th Street are parallel. At**what acute angle do Strait Street and Oak Avenue meet? A. 76 B. 75 C. 53 D. 52 5-Minute Check 6**Content Standards**G.GPE.5 Prove the slope criteria for parallel and perpendicular lines and use them to solve geometric problems (e.g., find the equation of a line parallel or perpendicular to a given line that passes through a given point). Mathematical Practices 4 Model with mathematics. 7 Look for and make use of structure. 8 Look for and express regularity in repeated reasoning. CCSS**You used the properties of parallel lines to determine**congruent angles. • Find slopes of lines. • Use slope to identify parallel and perpendicular lines. Then/Now**slope**• rate of change Vocabulary**A.Find the slope of the line.**Find the Slope of a Line Substitute (–3, 7) for (x1, y1) and (–1, –1) for (x2, y2). Example 1**B. Find the slope of the line.**Find the Slope of a Line Substitute (0, 4) for (x1, y1) and (0, –3) for (x2, y2). Example 1**C. Find the slope of the line.**Find the Slope of a Line Substitute (–2, –5) for (x1, y1) and (6, 2) for (x2, y2). Example 1**D. Find the slope of the line.**Find the Slope of a Line Substitute (–2, –1) for (x1, y1) and (6, –1) for (x2, y2). Example 1**A.**B. C. D. A. Find the slope of the line. Example 1a**A.0**B.undefined C.7 D. B. Find the slope of the line. Example 1b**A.**B. C. –2 D.2 C. Find the slope of the line. Example 1c**A.0**B.undefined C.3 D. D. Find the slope of the line. Example 1d**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? Use Slope as Rate of Change Example 2**CELLULAR TELEPHONES Between 1994 and 2000, the number of**cellular telephone subscribers increased by an average rate of 14.2 million per year. In 2000, the total subscribers were 109.5 million. If the number of subscribers increases at the same rate, how many subscribers will there be in 2010? A. about 251.5 million B. about 166.3 million C. about 180.5 million D. about 194.7 million Example 2**Determine whether and are**parallel,perpendicular, or neither for F(1, –3), G(–2, –1), H(5, 0), and J(6, 3). Graph each line to verify your answer. Determine Line Relationships Example 3**Determine whether AB and CD are parallel,perpendicular, or**neither for A(–2, –1), B(4, 5), C(6, 1), and D(9, –2) A. parallel B. perpendicular C. neither Example 3**Graph the line that contains Q(5, 1) and is parallel to MN**with M(–2, 4) and N(2, 1). Use Slope to Graph a Line Example 4**Graph the line that contains R(2, –1) and is parallelto OP**with O(1, 6) and P(–3, 1). A. B. C.D. none of these Example 4**Assignment:**• 192/ 1-25,28-39,41-50,58-68,71-74

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