Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 8 - Polynomials and Factoring - Common Core Cumulative Standards Review - Selected Response - Page 542: 16

Answer

$75$

Work Step by Step

This question is about direct variation. The formula for a direct variation is $y = kx$ Where k is a constant. "A student who correctly answers 14 questions receives a score of 70." Plug these in, where y is the score, and x is the number of questions correct. $70 = 14k$ $k = 5$ Now, we know the formula for this variation $y = 5x$ To know the score for 15 correct answers, plug in 15 as x $y = 15*5$ $y = 75$
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