Scatterplot STAAR Practice

Which scatterplot best represents a nonlinear relationship between the x-and y-values?

• A

• B

• C

• D

Which scatterplot best represents a linear relationship between the x-and y-values?

• A

• B

• C

• D

Students recorded the total number of pages and chapters in each of several books on the scatterplot. Based on the scatterplot, which is the best prediction of the total number of pages in a book with 4 chapters?

• 150 pages

• 140 pages

• 90 pages

• 120 pages

The scatterplot shows the time spent playing a video game and the number of points scored by several students. Based on the scatterplot, which is the best prediction of the number of points scored by a student who spends 45 minutes playing the video game?

• 1,200

• 920

• 1,060

• 1,300

Phil collected data from several of his friends about the number of hours they spent sleeping and the number of hours they spent playing video games on Saturday. He recorded the data in the scatterplot.

Based on the scatterplot, what is the best prediction of the number of hours one of Phil’s friends spends sleeping when the friend spends 1 hour playing video games?

• 9 hours

• 8 hours

• 10 hours

• 7 hours

A math teacher observed that as the number of hours students studied their multiplication facts increased, the number of errors the students made on their multiplication tests decreased. Which scatterplot could support this teacher's observation?

• A

• B

• C

• D

The scatterplot shows the energy in watts and the light output in lumens per watt of several lightbulbs. Which statement best describes the association between the energy and light output of these lightbulbs?

• As the energy increases, the light output increases.

• As the energy increases, the light output decreases.

• As the energy increases, the light output remains the same.

• There is no apparent association between the energy and light output.

Students in a science class investigated how the speed of sound changes with the air temperature outside. The data are shown in the scatterplot.

Based on the scatterplot, what is the best prediction of the speed of sound when the air temperature is 50°C?

• 350 m/s

• 355 m/s

• 360 m/s

• 365 m/s