Ual mathematics curriculum
lesson 9
8.6
lesson summary
alne can be used to represent the trend in a scatter plot.
evaluating the equation of the line for a value of the independent variable determines a value predicted
by the line
a good line for prediction is one that goes through the middle of the points in a scatter plot and for which
the points tend to fall close to the line.
problem set
the monopoly board game is popular in many countries. the scatter plot below shows the distance from "go" to a
property in number of spaces moving from "go" in a clockwise direction) and the price of the properties on the
monopoly board. the equation of the line is p = 8x + 40, where p represents the price (in monopoly dollars) and
x represents the distance (in number of spaces)
distance from "go"
(number of spaces)
price of property
(monopoly dollars)
60
distance from "go"
(number of spaces)
21
60
23
24
25
26
27
price of property
(monopoly dollars)
220
220
240
200
260
260
150
280
8
9
11
28
200
100
100
120
140
150
140
160
200
180
180
12
13
29
31
32
300
300
15
34
35
16
18
320
200
350
37
29
41