Here are data that show a student's scores for 10 rounds of a video game.

• 130
• 150
• 120
• 170
• 130
• 120
• 160
• 160
• 190
• 140

What is the median score?

The medians of the following dot plots are 6, 12, 13, and 15, but not in that order. Match each dot plot with its median.

<p>A dot plot, 0 to 20 by twos. The plot begins with 1 in increments of 1, the number of dots above each increment is 1, 1, 0, 0, 2, 2, 1, 2, 1.</p>

<p>A dot plot, 0 to 20 by twos. The dot plot begins with 10 in increments of 1, the number of dots above each increment are 2, 2, 0, 0, 0, 3, 0, 1, 1, 1.</p>

<p>A dot plot, 0 to 20 by twos. The dot plot begins with 5 in increments of 1, the number of dots above each increment are 1, 1, 0, 0, 1, 0, 2, 0, 1, 1, 3. </p>  

<p>A dot plot, 0 to 20 by twos. The dot plot begins with 8 in increments of 1, the number of dots above each increment is 2, 0, 2, 0, 0, 2, 1, 0, 3.</p>  

Here is a dot plot that shows the ages of teachers at a school.

Which of these statements is true of the data set shown in the dot plot?

<p>A dot plot, age in years, 30 to 64 by twos. Beginning with 30 in increments of 1, the number of dots above with increment is 1, 1, 2, 2, 2, 2, 4, 2, 1, 2, 2. The number of dots at 46 is 1, at 47 is 1, at 50 is 2, at 55 is 1, at 62 is 1, and at 64 is 1.</p>  

In his history class, Han's homework scores are:

The history teacher uses the mean to calculate the grade for homework. Write an argument for Han to explain why median would be a better measure to use for his homework grades.

Invent a data set with five numbers that has a mean of 10 and a median of 12.

Ten sixth-grade students reported the hours of sleep they get on nights before a school day. Their responses are recorded in the dot plot.

Looking at the dot plot, Lin estimated the mean number of hours of sleep to be 8.5 hours. Noah's estimate was 7.5 hours. Diego's estimate was 6.5 hours.

Which estimate do you think is best? Explain how you know.

Triangle \(DEF\) has vertices \(D(\text-4, \text-4), E(\text-2, \text-4)\), and \(F(\text-3, \text-1)\).

1. Plot the triangle in the coordinate plane and label the vertices.
2. Name the coordinates of 3 points that are inside the triangle.
3. What is the area of the triangle? Show your reasoning.