Graphics Interpretation - Scatterplots and Bubble Graphs

The scatterplot shows the ages and shoe sizes of 10 boys and 10 girls, all between 2 and 10 years of age. In the graph, blue circles represent boys and pink pluses represent girls.

From each drop-down menu, select the option that creates the most accurate statement based on the information provided.

[[dropdown1]] % of the boys have a shoe size that is six or greater.

In the group, [[dropdown2]] girl(s) is/are seven years old.

Incorrect.

You may have gotten this answer if you found the number of boys who are seven years old. The problem, however, asks for the number of girls who are seven.

Use the horizontal axis to find the vertical line that represents seven years old. Then count the number of pink pluses on that line.

Incorrect.

You may have gotten this answer if you found the number of girls with a shoe size of seven.

To find the number of seven-year-old girls, you should use the horizontal axis since it gives age. Count the number of pink pluses on the vertical line that represents seven-year-olds.

That's right!

Use the horizontal axis to find the vertical line that represents seven years old. Then count the number of pink pluses on that line.

Since there is only one plus on that line, the answer is one girl.

Incorrect.

You may have gotten this answer if you found the number of boys and girls who are seven years old. The problem specifically asks for the number of girls who are seven.

Use the horizontal axis to find the vertical line that represents seven years old. Then count the number of pink pluses on that line.

Correct!

Use the vertical axis to find the horizontal line that represents six years old. Then count the number of blue circles (for boys) that are on this line or above it.

There are two circles on the line and five circles above it. Thus, seven boys have a shoe size of six or greater.

The group has a total of 10 boys, so $$\frac{7}{10}$$, or 70%, of the boys wear a size six or greater.

Incorrect.

You may have gotten this answer if you found the percentage of boys and girls who wear a size six or greater. The problem, however, only asks for the percentage of boys with those shoe sizes.

Incorrect.

You may have gotten this answer if you did not include boys with a size six shoe. Since the problem asks about the boys with a size "six or greater," you should include boys who wear size six, size seven, size eight, and so on.