 What is the relative frequency of males that play soccer to
total students that play sports?
 What is the relative frequency of females that play
basketball to the total number of students that play
basketball?
 A baseball coach graphs some data and finds the line of
best fit. The equation for the line of best fit is y = 0.32x –
20.51, where x is the number of times at bat and y is the
number of hits.
 How many hits should he expect from a player who is at
bat 175 times?
 y = 0.32(175) -20.51
 y = 56 – 20.51
 y = 35
 35 hits
 Dre collected data on the ages and heights of a random
sample of elementary school students. If he plots the data
on a scatter plot, what relationship will he most likely see
between age and height?
 A) A negative correlation
 B) No correlation
 C) A positive correlation
 D) A constant correlation
The scatter plot below shows the average yearly
consumption of bottled water by people in the United States
starting in 1990.
Using the line of best fit,
predict the average
consumption of bottled
water in the year 2000?
19 gallons
 Mr. Rowell made a graph to represent the time his students
spent studying for their test and their actual test score.
 Which is the correct equation for the line of best fit?
𝑦2 − 𝑦1
𝑦 = 𝑚𝑥 + 𝑏
𝑥2 − 𝑥1
𝑦 = 1.4𝑥 + 𝑏
65 = 1.4(7) + 𝑏
90 − 65
−9.8 = −9.8
25 − 7
55.2 = 𝑏
𝑦 = 1.4𝑥 + 55.2
25
18
1.4
Determine the correlation for each statement.
A) The number of people at your party and the number of
sodas you have in the refrigerator. Negative
B) The amount your drive to school and the amount you
have to pay for gas. Positive
C) The size your dog and the number of times you take it to
the vet. No Correlation
 Explain whether the scatter plot of the data for each of the
following shows a positive, negative, or no association.
Interpret the scatter plot.
Negative
Positive
 Construct a scatter plot from the data. Interpret the scatter
plot.
18
16
Positive
14
12
10
1
3
5
7
9
 How do you find the initial value from a table of values and
from a graph?
 Locate where the “x” value is Zero
 How do you create a linear model from a scatter plot?
 Plot the data
 Draw a line through the middle of the data
 Using 2 points on the line, determine the slope.
 Using the slope and 1 of the points, determine the “B” and
write the equation.
 Draw a graph that has a slope of -3 and has an initial value
of 4.
 What is the linear model that represents the graph in #10?
y = -3x + 4
 Use the following equations, to answer questions 12-14
 12. Which equation has the greatest rate of change?
C. y = -5x + 2
 13. What is the rate in #12?
-5
 14. Is the change in #13 increasing or decreasing?
Decreasing
 Identify the patterns for each of the scatter plots as positive
or negative association, linear association, nonlinear
association, no correlation and/or outliers-there may be
more than 1 answer for each graph:
a. No Correlation
b. Positive Linear
c. Negative Linear
d. Linear
e. Linear
f. Outliers
12,756 people
 From the table on question 16, of those with normal blood
pressure, what percentage of people are over the age of
30?
𝟕𝟒𝟖𝟗
𝟗𝟒𝟖𝟐
= 𝟕𝟗%
𝟓𝟎
𝟏𝟎𝟎
=
.𝟓
𝟐𝟓
𝟓𝟎
= .𝟓
𝟏𝟎
𝟐𝟎𝟎
= . 𝟎𝟓
𝟐𝟒