Interpreting Graphs and Scatterplots

The motion of a jogger along a straight stretch of road can be modeled using a function as shown.

For which interval is the function linear and decreasing?

• between 0 and 3

• between 3 and 5

• between 5 and 7

• between 7 and 10

Mary recorded the total number of people at the gym and the highest temperature during the day over a period of 10 days. Based on the scatter plot, what can Mary interpret about the relationship between the highest temperature during the day and the number of people who go to the gym?

• More people went to the gym when the temperature was warmer

• More people when to the gym when the temperature was colder.

• People do not go to the gym when the temperature is below 70 degrees

• There is no relationship

The table shows the average number of minutes customers at a credit union waited in line and the average number of minutes spent with the teller for several different tellers.

According to the data, which choice best describes the association between the average number of minutes spent in line and the average number of minutes spent with a teller?

• no association

• a negative association

• a positive association

• not enough information

Consider point P on the scatter plot. Which word best describes point P?

• cluster

• correlation

• linear

• outlier

If the equation of a line of best fit is y= -3x +4, what must be true about the scatter plot?

• it has no correlation

• it has a negative correlation

• it has a positive correlation

• it cannot be determined

In order to draw an appropriate line of best fit, how should you draw your straight line?

• as close to all the data points as possible

• through the first two data points

• through the first and last data point

• as close to the data points with the highest y-values as possible

A scatter plot is shown in the figure. Which phrase best describes the data of this scatter plot?

• linear association with clustering

• negative nonlinear association

• nonlinear association with outliers

• positive linear association

Which data set most likely has no correlation?

• the time spent on studying for a test and the test score

• the color of your eyes and your shoe size

• the increase of your pay check and the number of hours you work

• the increase in ice cream sales and the rise in temperature

Edward is collecting data comparing the number of calories burned and the amount of time spent jogging, in minutes. When Edward draws his scatter plot, which variable should be used as the independent variable?

• minutes spent jogging

• number of calories burned

• distance traveled

• outdoor temp

The scatter plot compares the class absences and exam scores for 15 students. What is the predicated score for someone with 7 absences?

• 45

• 55

• 65

• 75