Functions and Scatter Plots Review

When finding the line of best fit for a scatter plot, you need to ensure which of the following?

• The points on the graph should always have a positive correlation.

• The points on the graph should always have a negative correlation.

• The points on the graph should have no correlation.

• There are the same number of points above and below the line.

How can you determine if a relation in a given table represents a function?

• The table can only have the variables x and y.

• Find the rate of change for the table.

• Analyze the table to make sure the input values are not repeated.

• Analyze the table to make sure the y values are not repeated.

• The charge for a trip with a distance of 5 miles is $5 greater for Taxi 1 than for Taxi 2.

• The charge for a trip with a distance of 5 miles is $5 less for Taxi 1 than for Taxi 2.

• The charge for a trip with a distance of 5 miles is $20 for both Taxi 1 and Taxi 2.

• The charge for a trip with a distance of 5 miles cannot be determined for either Taxi 1 or Taxi 2.

• Day 15

• Day 48

• Day 33

• Day 18

Which of the following lines represents the line of best fit for the scatter plot?

• A

• B

• C

• D

Which sentence describes the relationship shown on this scatter plot?

• As the average daily temperature decreases, the number of visitors at the beach increases.

• As the average daily temperature increases, the number of visitors at the beach increases.

• As the average daily temperature increases, the number of visitors at the beach decreases.

• There is no apparent relationship between the average daily temperature and the number of visitors at the beach.

Is the relation a function? Why.

• Yes, because the x-value 11 has two y-values pair with it.

• Yes, because each x-value has only one y-value paired with it.

• No, because the x-value 11 has two y-values pair with it.

• No, because each x-value has only one y-value paired with it.

• Function
• Not a Function

Give the domain and range. Tell if it is a function.

• Not a Function

• Function

• (-4, 0)

• (-2, 1)

• (0, -4)

• (1, -2)