Noteables Interactive Study Notebook (26491.0K) - McGraw-Hill ...

6–6EXAMPLETEST EXAMPLE The table showsthe number of plants in a garden,based on the number of rows.Which expression was used to findthe number of plants in n rows?A n + 3C 3nB n - 3 D 3n + 1Numberof RowsNumberof Plants1 42 73 104 13nRead the Item To find the expression, determine thefunction.Solve the Item Notice that the values 4, 7, 10, 13, …increase byand, so the rule contains 3n. Therefore, choicescan be eliminated.If the rule were simply 3n, then the value for position 1 wouldbe 3 × 1 or 3. But this value is 4. So, choiceeliminated.can beThis leaves choice. Test a few values.HOMEWORKASSIGNMENTPage(s):Exercises:Row 1: 3n + 1 = 3(1) + 1 =Row 3: 3n + 1 = 3(3) + 1 =So, the answer is .Check Your ProgressMULTIPLE CHOICE The tableshows the number of studentsallowed to go on a field trip based onthe number of adults accompanyingthem. Which expression was usedto find the number of studentsfor n adults?F n − 1 H n + 5G 5n − 1J 5nNumberof AdultsNumber ofStudents1 42 93 144 19nCopyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.160 Math Connects, Course 1