Countdown: 11 Weeks

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Countdown: 11 Weeks
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