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Name Class Date 5-4 Think About a Plan Point-Slope Form Boiling Point The relationship between altitude and the boiling point of water is linear. When the altitude is 8000 ft, water boils at 197.6°F. When the altitude is 4500 ft, water boils at 203.9°F. Write an equation giving the boiling point b of water (in degrees Fahrenheit) in terms of the altitude a (in feet). What is the boiling point of water at 2500 ft? Understanding the Problem 1. What are you given? __________________________________________________________________________ 2. In general, how can this information be used to answer the question? __________________________________________________________________________ Planning the Solution 3. What is the slope formula? __________________________________________________________________________ 4. Substitute given values into the slope formula and simplify. Show your work. __________________________________________________________________________ 5. Which point can be used to write the point-slope form of the equation? __________________________________________________________________________ 6. What strategy can you use to solve this problem? __________________________________________________________________________ 7. How can you determine the boiling point of water at 2500 ft? __________________________________________________________________________ Getting an Answer 8. Write an equation giving the boiling point b of water (in degrees Fahrenheit) in terms of the altitude a. 9. What is the boiling point of water at 2500 ft? Show your work. 8 Prentice Hall Algebra 1 • Teaching Resources Copyright © by Pearson Education, Inc., or its affiliates. All Rights Reserved. 32 For review purposes only. Not for sale or resale.
Name Class Date 5-4 Practice Form G Point-Slope Form Write an equation of the line in slope-intercept form through the given point and with the given slope m. 1. (2, 1); m = 3 2. (–3, –5); m = –2 3. (−4, 11); m= 3 2 4. (0, −3); m = − 4 3 Graph each equation. 5. y − 2 = 2(x + 3) 6. y + 3 = –2(x + 1) 7. Write an equation in point-slope form for each line. 8. 9. 10. Write an equation in point-slope form of the line through the given points. Then write the equation in slope-intercept form. 11. (4, 0), (−2, 1) 12. (−3, −2), (5, 3) 13. (−5, 1), (3, 4) 1 14. Open-Ended Write an equation of a line that has a slope of − in each form. 2 a. point-slope form b. slope-intercept form Prentice Hall Gold Algebra 1 • Teaching Resources Copyright © by Pearson Education, Inc., or its affiliates. All Rights Reserved. 33 For review purposes only. Not for sale or resale. 9
Page 1 and 2: Teacher Resource Sampler Algebra 1
Page 3 and 4: Pearson Algebra 1 Contents Student
Page 5 and 6: Key Concept Point-Slope Form of a L
Page 7: Got It? Reasoning Write the equatio
Page 11 and 12: Name Class Date 5-4 Practice Form K
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Page 41 and 42: Name Class Date Cumulative Review C
Page 44: Pearson Algebra 1, Geometry, Algebr

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