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Problem Solving Tanya bought p pens. She gives away 126 pens. Tanya has 217 pens left. Write an equation that can be used to determine how many pens Tanya.

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Presentation on theme: "Problem Solving Tanya bought p pens. She gives away 126 pens. Tanya has 217 pens left. Write an equation that can be used to determine how many pens Tanya."— Presentation transcript:

1 Problem Solving Tanya bought p pens. She gives away 126 pens. Tanya has 217 pens left. Write an equation that can be used to determine how many pens Tanya originally bought.

2 Problem Solving Four friends eat at a restaurant. The total cost of the meal is $24.80. They want to include 15% tip and then divide the total cost evenly. How much should each person pay?

3 x-int: (1,0) y-int: (0,-2)x-int: none y-int: (0,-4)x-int: (-3,0) y-int: (0,9) x-int: (4,0) y-int: (0,2) x-int: (3,0) y-int: (0,-5)x-int: (-7,0) y-int: none

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6 Vocabulary Intercepts

7 Points where line crosses the x-axis and the y-axis.

8 Home Repair Renata Jones has $300 for home repairs. A plumber charges her $50 an hour. The equation y = -50x + 300 represents the amount of money left in her budget after x number of plumbing hours. Use the intercepts to graph the equation.

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10 Shopping Suzanne has $125 to spend on new shoes. The shoe store is having a sale in which every pair of shoes is priced at $25. The equation y = -25x +125 represents the amount of money Suzanne has left after purchasing x pairs of shoes. Use the intercepts to graph the equation.

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12 Graphing Linear Equations Method 1: Method 2: Method 3: 1. 2. 3. 1. 2. 3. 1. 2. 3. 1. 2. 3. Graph the Line What does the line represent?

13 Method 1: Using a Table 1.Solve equation for y. 2.Use the table to find 4 ordered pairs. 3.Plot the ordered pairs.

14 Practice Solving for y.

15 Method 2: Using x- and y- intercepts x-intercepty-intercept 1.Set y = 0. 2.Solve for x. 3.Graph the x-int. 1.Set x = 0. 2.Solve for y. 3.Graph the y-int.

16 Find x and y intercept.

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18 Graphing Linear Equations Method 1: Using a Table Method 2: Using x- and y- intercepts Method 3: 1.Solve equation for y. 2.Use the table to find 4 ordered pairs. 3.Plot the ordered pairs. x-intercepty-intercept 1. 1.Set y = 0. 2.Solve for x. 3.Graph the x-int. 1.Set x = 0. 2.Solve for y. 3.Graph the y-int. Graph the Line What does the line represent?

19 Homework Graphing Activity. 8 points


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