Name
SavvasRealize.com
3-5 Lesson Quiz
Scatter Plots and Lines of Fit
1. What type of association is shown by the data in the
scatter plot?
𝖠 positive association
𝖡 ​negative association
𝖢 ​no association
𝖣 ​trend association
2. Which equation best models the data shown in the
scatter plot?
𝖠 ​y = x − 3
𝖡 ​y = x − 5
𝖢 ​y = 3x − 3
𝖣 ​y = 3x − 5
40
20
0
x
0
20
40
y
x
−4 −2 O
2
4
−2
−4
−6
3. When Hana goes to the mall, she always buys the same
lunch and also buys some books. The table shows the
number of books she buys x and the total amount of
money she spends y. Make a scatter plot of the data.
Tell whether there is a positive correlation, a negative
correlation, or no correlation. Then, if possible, draw a
trend line.
y
60
x
1
2
2
3
4
y
17
21
23
26
34
y
30
20
10
x
O
2
4
correlation:
4. Which statements about the trend line in Item 3 are true?
Select all that apply.
𝖠 ​The slope is the cost of one book.
𝖡 ​The slope is the cost of Hana’s lunch.
𝖢 ​The y-intercept is the cost of one book.
𝖣 ​The y-intercept is the cost of Hana’s lunch.
5. Hana draws a trend line for the scatter plot in Item 3 and writes the equation
y = 5.5x + 11 to represent the line. Use her equation to predict how much she
will spend if she buys 8 books.
enVision™ Algebra 1 • Assessment Resources