Practice - McGraw-Hill Higher Education

9-5NAME______________________________________________ DATE______________ PERIOD _____PracticeExponential FunctionsGraph each function. State the y-intercept. Then use the graph to determine theapproximate value of the given expression. Use a calculator to confirm the value.1 101. y x; 0.5 2. y 3 x ;3 1.9 3. y x ; 1.4y1 10y1 41 4OxOxGraph each function. State the y-intercept.4. y 4(2 x ) 1 5. y 2(2 x 1) 6. y 0.5(3 x 3)yyOxOxCopyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.Determine whether the data in each table display exponential behavior. Explainwhy or why not.7. x 2 5 8 118. x 21 18 15 12y 480 120 30 7.5y 30 23 16 99. LEARNING Ms. Klemperer told her English class that each week students tend to forgetone sixth of the vocabulary words they learned the previous week. Suppose a studentlearns 60 words. The number of words remembered can be described by the functionxW(x) 60 5 , where x is the number of weeks that pass. How many words will the6student remember after 3 weeks?10. BIOLOGY Suppose a certain cell reproduces itself in four hours. If a lab researcherbegins with 50 cells, how many cells will there be after one day, two days, and threedays? (Hint: Use the exponential function y 50(2 x ).)Lesson 9-5Chapter 9 37 Glencoe Algebra 1