Grade 7 – Chapter 4
QUESTION #5
 Sainan is designing
 Use a scatter plot to
determine the
fences for a summer
number
of
posts
and
job. One kind of rail
fence has three rails rails he will need for
a fence that is 12
and one post per
sections. Explain
section
what you did.
A) 12 Sections Long
Section Number
Posts
Rails
Posts and Rails
1
2
3
5
2
3
6
9
3
4
9
13
4
5
12
17
5
6
15
21
60
Number of Posts and Rails
50
40
30
20
10
0
0
2
4
6
8
10
Number of Sections
12
14
16
QUESTION #8
 Nitharsana is
 Use a scatter plot to
determine the
building a rail fence
number
of
posts
and
that has sections
rails Nitharsana will
like this.
need to build each
fence.
A) 8 Sections long
B) 14 Sections long
Section Number
Posts
Rails
Posts and Rails
1
2
4
6
2
3
8
11
3
4
12
16
4
5
16
21
5
6
20
26
80
Number of Posts and Rails
70
60
50
40
30
20
10
0
0
2
4
6
8
10
Number of Sections
12
14
16
MATH CONGRESS
QUESTION ONE
 Usha reads 10 pages of a novel
on night 1. Each night after that
she reads three pages more
than the night before. Usha
thinks she can finish reading
her 219 page novel in 10 days.
Thivya thinks it’ll take her 22
days.
QUESTION TWO
 The student council held a car
wash to raise $200 for the
Children’s Hospital. In the first
hour they washed three cars.
Each hour after that the number
of cars they washed increased by
two. How many cars did they
wash at the end of 6 hours? If
they charged $5.00 per car did
they reach their goal?
What strategy will you use, Table of Values or
a Scatter Plot to solve the problem? Why did
you choose that strategy.