how to check your homework that involves graphing. locate the x-intercept and the y-intercept on...
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How to check your homework that involves graphing.
Locate the x-intercept and the y-intercept on your graph to see if it matches the answer key.
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30. y = x + 2 32. y = x – 4 34. y = -2x + 2
36. x + y = 1 38. 2x + y = 5 40. x = 2
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The equation y = 0.62x describes the approximate number of miles y in x kilometers.
1. Describe what the solution (8, 4.96) means.
2. About how many miles is a 10-kilometer race?
3. Mr. Fish is running a half-marathon (13.1 miles) this spring. How many kilometers would that be?
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During a workout, a target heart rate y in beats per minute is represented by y = 0.7(220 – x),
where x is a persons age.
1. Compare target heart rates for a 20 year old and a 50 year old.
2. What would your target heart rate be?
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Section 8.3
Graphing Linear Equations Using Intercepts
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State the x-intercept and the y-intercept of the line.
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Find the x-intercept and the y-intercept for the graph of:
4y = -3x + 24
y = 4x
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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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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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Homework
Practice 8.3