Transcript Lesson 7.1 note set

#26-2
Are these rates equivalent?
1)
16 students
80 students
3booklets
15 booklets
February 22, 2011
Find the percent of the number
2) 17.92% of 50
3) Every week, Jahmeelah’s class gets a list of 10 new spelling words. On
Monday, her teacher gives the class a pretest to see how many of the words the
students already know how to spell. Her teacher wants to know the most
common score is before she prepares her lessons. The table below show how
many words the students spelled correctly. Which of the following pieces of
information will be the most helpful to Jahmeelah’s teacher in determining how
many words most of her students already
know how to spell?
Simplify the ratios
Find the distance
(d = r • t)
(your ratios should still be a
FRACTION after you
have simplified)
15
5
64
12
24
6
Set up problems like
unit rate questions
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d = 600mi, t = 7hrs
=
r = ___
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=
d = 240m, t = 6hrs
r = ___
___
=
___
=
=
$80
5 trips
=
49 people
7 tables
=
14
4
=
42
8
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OR
r = 82m / sec, t = 3 sec
d = ___
14 flowers
2 bouquets
35 pencils
5 students
81essays
3 classes
r = 18km / min, t = 4 min
d = ___
d = 90mi, t = 1.5hrs.
r = ___
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Baskets made
PLAYER 1 I I I I
Questions
answered
PLAYER 2
II
PLAYER 1
III
PLAYER 3
I
PLAYER 2
II
PLAYER 4
0
PLAYER 3
IIII
PLAYER 5
II
PLAYER 4
IIII
____
blue
red
green
18
72
18
27
54
red
orange
black
63
28
63
27
18
green
orange
green
18
89
81
27
43
You have the following scores on your math
quizzes. What is your median score? _______
You have the following scores on
your reading tests What is your
median score? _______
5
6
7
8
9
10
Chapter 5 test TOMORROW
#26-3
February 23, 2011
Find the UNIT RATE
1) A swimmer swims 80 laps in 1.5 hours
Find the mean of the given data
2) 89.5, 88.7, 91.3, 93.2, 90.6
3) The football team at Jefferson High School completed their season with a
mean of 18 points scored per home game. The table below shows the final
scores for each of their home games. How many points did Jefferson High
School score in their last home game?
NO HOMEWORK due to Chapter 5 test today!
#26-4
Which is the better buy?
1) 3 slices of pizza for $4.00
8 slices of pizza for $9.99
February 24, 2011
What is the range of the data?
2) 53, 72, 69, 81, 93, 93, 100, 34
3) When Jillian’s family had a reunion, she meets many of her relatives for the first
time. She realizes that on her dad’s side of the family, she has 13 cousins. She asks
some of her friends how many cousins they have. Their responses are shown in
the table below. Which of the following measures of this data is the least?
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12).
13).
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#26-5
February 25, 2011
1) You travel 204 miles in 3 hours.
Find the mode of the given data
How many miles do you travel
2)
4.75, 3.25, 4.25, 3.75,
in 5 hours?
5.15, 3.25, 4.50, 3.25
3) In order to earn a scout badge, Artie worked on a project that required
him to conduct a survey. Artie decided to ask the question, “How many
video games do you own?” to his fellow scouts. His results are shown in the
table below. Which of the statements about this data is FALSE?
A. The median number of video
games owned is 12.
B. The mean is the best
representation of the typical
number of video games ow ned.
C. The mode of the number of
video games ow ned is 12.
D. The results of the survey might
not represent the number of
video games ow ned by a
randomly selected student.
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You will probably need a variable (letter) to write your equation.
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