NAME DATE PERIOD SCORE Countdown: 11 Weeks Diondre goes for a bike ride. The graph represents Diondre’s speed during the ride. Write the appropriate section of the graph for each description about Diondre’s ride. 8.F.5 Section A ! Section B ! Section C D Speed 1. C B E A ! Section E ! Section D Time Diondre travels at his fastest speed during the ride. Diondre starts his bike ride and picks up speed as he continues to ride. Diondre increases his speed at a constant rate until he reaches his fastest speed. Diondre decreases his speed steadily until he comes to a stop. After increasing his speed gradually, Diondre rides at a comfortable and constant speed for a time. Copyright © McGraw-Hill Education. Permission is granted to reproduce for classroom use. 2. A clothing store is having a 20% off sale. Renata has a coupon for $5 off. The function f(x) = 0.8x – 5 represents the final cost after the discount and coupon are applied of an item priced at x dollars. Complete the function machine for items A, B, C, and D. 8.F.1, 8.F.4 Input A: $75 Input B: Input C: $25 Input D: 3. → f(x) = 0.8x – 5 → Output A: Output B: $35 Output C: Output D: $75 Kayak World charges $10 to rent a spray skirt all day plus $12.50 an hour to rent a kayak. BoatLand charges $5 to rent a spray skirt all day plus $15 an hour to rent a kayak. Write an equation to find h, the number of hours for which the total cost is the same at both rental places. Then solve the equation, and state what the cost is when it is the same. 8.EE.7, 8.EE.7b Equation: + = + h= Cost for that number of hours: Course 3 • Countdown • 11 Weeks 31 4. Think Smart for SBAC This number line shows four points labeled A, B, C, and D. Select whether each statement is true or false. 8.NS.2 A B 9 True C D 9.5 False On the actual test, you might be asked to click the appropriate box for each statement. In this book, you will be asked to shade the boxes instead. 10 ___ The value of √82 is to the left of point A. ___ The value of √90 is between point B and point C. ___ The coordinate of point D is less than √94 !. 5. Cleo just started reading a book that has 375 pages. She can read 50 pages in one day. The equation for the number of pages she has left to read is y = 375 – 50x, where x is the number of days she has been reading the book. 8.F.3, 8.F.4 Part A: Graph the equation on the coordinate plane. –375 –50 –25 7.5 x-intercept 25 50 375 slope y-intercept The slope is !. The y-intercept is shows the initial number of pages The shows that the number of pages that still Course 3 • Countdown • 11 Weeks pages per day. 500 450 400 350 300 250 200 150 100 50 0 y x 1 2 3 4 5 6 7 8 9 10 Number of Days Copyright © McGraw-Hill Education. Permission is granted to reproduce for classroom use. The to be read. need to be read decreases by 32 !. Pages Left to Read Part B: Write a number or word to complete each statement. Cleo’s Reading Rate