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Chapter 8.2 Day 1

Chapter 8.2 Day 1. Vocabulary Equation in two variables ex: 2x – 2y = 5 Solution of an equation in x and y is an ordered pair ( x,y ) that produces a true statement when the values x and y are substituted into the equation. Objective 1: checking solutions.

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Chapter 8.2 Day 1

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  1. Chapter 8.2 Day 1 • Vocabulary • Equation in two variables ex: 2x – 2y = 5 • Solution of an equation in x and y is an ordered pair (x,y) that produces a true statement when the values x and y are substituted into the equation.

  2. Objective 1: checking solutions • Tell whether the ordered pair is a solution of 2x – y = 5 (1,-3) (4,7)

  3. Checking solutions • Are the following ordered pair a solution of 3x + 2y = -8 (0,4) (-2,-1)

  4. Objective 2: finding solutions For the 1859 Mauna Loa eruption, the lava’s distance d (in miles) from the ocean t hours after it left the volcano can be approximated by the equation d = 32 – 4t. • Make a table of solutions for the equation • How long will it take the lava to reach the ocean?

  5. Finding Solutions Morgan is riding her bike to her friends house. Her distance can be represented using the formula y = 5x – 3. Make a table of solutions for the equation How far will she have traveled in 20 minutes?

  6. Finding Solutions To rent a cabin for one night, a resort charges $50 a night and $10 per person. A formula to represent this is y = 10x + 50. Make a table of solutions for this equation: • How much would is cost a group of 15 people to rend the cabin?

  7. Practice • Are the following ordered pair solutions to the equation y = -2x – 5? (5, -5) (2, -9) • Make a table of solutions for the formula y = -x + 3

  8. Homework • Page 394 #’s 12-15, 32-40

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