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Intermediate Algebra – Student Workbook – Second Edition 2013

Intermediate Algebra – Student Workbook – Second Edition 2013

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Lesson 1a <strong>–</strong> Introduction to Functions<br />

Mini-Lesson<br />

When working with FUNCTIONS, there are two main questions we will ask and solve as<br />

follows:<br />

Given a particular INPUT value, what is the corresponding OUTPUT value?<br />

Given a particular OUTPUT value, what is the corresponding INPUT value?<br />

Problem 13<br />

MEDIA EXAMPLE <strong>–</strong> WORKING WITH INPUT AND OUTPUT<br />

Given f(x) = 2x + 5, determine each of the following. Round to two decimals as appropriate.<br />

GIVEN INPUT FIND OUTPUT<br />

GIVEN OUTPUT FIND INPUT<br />

Find f(0) Find x if f(x) = 7<br />

Find f(-2) Find x if f(x) = -11<br />

Problem 14<br />

YOU TRY <strong>–</strong> WORKING WITH INPUT AND OUTPUT<br />

Given f(x) = -3x <strong>–</strong> 4, compute each of the following. Round to two decimals as appropriate.<br />

GIVEN INPUT FIND OUTPUT<br />

GIVEN OUTPUT FIND INPUT<br />

Find f(2) Find x if f(x) = 7<br />

Find f(-3) Find x if f(x) = -12<br />

Scottsdale Community College Page 13 <strong>Intermediate</strong> <strong>Algebra</strong>

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