Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 4 - An Introduction to Functions - 4-5 Writing a Function Rule - Practice and Problem-Solving Exercises - Page 266: 27


a) Meal cost | Money remaining 15 | 37.75 21 | 30.85 24 | 27.4 30 | 20.50 b) m=55-1.15c

Work Step by Step

We can find the equation m=55-1.15c because the person starts with 55 dollars and that becomes the y-intercept and since a 15% tax is being charged, that 15% becomes the slope as -1.15 because that is being subtracted from the total money which is 55. We can find the table by plugging in the values in the function rule. m=55-1.15c (plug in 15 dollars) m=55-1.15(15) m=55-17.25 m=37.75 This gives you the table values of (15 , 37.75)
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