12. Plotting a single point
Transcript
Consider the following graph, which shows the relationship between an individual’s income and the
number of times he or she eats out each month.
Your AnswerManuel01234567891020181614121086420QUANTITY (Dinners out per month)INCOME
(Thousands of dollars per month)8, 16
Correct Answer
Points:
1 / 1
Hint
: When answering the following, be sure to specify the appropriate units.
The blue point already shown on the graph shows the data for Poornima. According to the graph,
Poornima’s income is
$5,000 per month
, and she has
10 dinners out per month
.
Points:
1 / 1
Close Explanation

Suppose Poornima’s friend Manuel has an income of $8,000 per month and has 16 dinners out per
month.
Use the orange point (square symbol) to plot the data for Manuel.

Because Manuel chooses to have 16 dinners out per month and the vertical axis of the graph shows
the quantity of dinners out per month, you should have placed the orange point at a vertical
coordinate of 16.
13. Points and slopes
Transcript
The following graph contains four lines (A, B, C and D), each of which has a slope that is either positive,
negative, zero, or infinite.
Y-axisX-axisBDCA
For each of the following scenarios, indicate whether the relationship between the two variables is
positive or negative, as well as which line on the previous graph has a slope that reflects this type of
relationship.
Hint
: The X-axis and Y-axis on the graph
are not
labeled intentionally. You need to substitute the
variables from each scenario for the horizontal and vertical axis. For example, in the first scenario, X-
axis should be labeled “ The average grade received" and Y-axis should be labeled "The number of
hours spent studying".
Scenario
Relationship
Line
As the number of hours spent studying rises, the average grade
received rises.
Positive
D
As the number of hours spent studying falls, the likelihood of
D

getting an A falls.
As the number of hours spent watching TV rises, the average
grade received falls.