Unit 5 - Scatterplot and MAD

Unit 5 - Scatterplot and MAD

CPMS 8th Grade Math

Scatterplot

Associations and Interpreting

Multiple Choice

What type of association is represented in the following graph.

• Positive Association

• Negative Association

• No Association

Multiple Choice

What type of association is represented in the graph.

• Positive Association

• Negative Association

• No Association

Multiple Choice

What type of association is represented in the graph?

• Positive Association

• Negative Association

• No Association

Multiple Choice

Choose the most appropriate description.

• Linear

• Non-Linear

Multiple Choice

Choose the most appropriate description.

• Linear

• Non-linear

Multiple Choice

Positive: As one variable _______, the other variable _______.

• Increase, Increase

• Decrease, Decrease

• Increase, Decrease

Multiple Choice

Negative: As one variable _______, the other variable _______

• Increase, Increase

• Increase, Decrease

Multiple Choice

Which scatterplot demonstrates a linear relationship between x and y?

Multiple Choice

Jayla runs on different trails near her home for exercise. She uses a positioning device to record how far from home she is when she stops running. The scatterplot shows Jayla's distance from her house when she stops running in relation to the length of time that she spent running.

• As the number of minutes Jayla is running increases, the distance from home when she stops running increases.

• As the number of minutes Jayla is running increases, the distance from home when she stops running remains the same.

• As the number of minutes Jayla is running increases, the distance from home when she stops running decreases.

• There is no relationship between the number of minutes Jayla spends running and the distance from home when she stops running.

Multiple Choice

Data concerning the number of hours watching YouTube and grade averages were gathered and plotted on the scatterplot below.

Which conclusion best supports the data plotted in the graph?

• There is a positive linear association between time spent watching YouTube and grade averages.

• There is a non-linear association between time spent watching YouTube and grade averages.

• There is a negative linear association between time spent watching YouTube and grade averages.

• There is no association between time spent watching YouTube and grade average.

Multiple Choice

The scatterplot below displays the amount of money Michael earns while washing cars.

Based on the information in the scatterplot, which statement is a valid conclusion?

• As the number of minutes Jayden spends washing cars increases, the amount of money he earns per hour increases.

• As the number of minutes Jayden spends washing cars decreases, the amount of money he earns per hour decreases.

• As the number of minutes Jayden spends washing cars increases, the amount of money he earns per hour increases.

• As the number of minutes Jayden spends washing cars increases, the amount of money he earns increases.

Multiple Choice

Which ordered pair could be added to the data points graphed to keep a linear relationship?

• (9,10)

• (9,-10)

• (-10,11)

• (10,11)

Scatterplots and Trendlines

Making predictions

Multiple Choice

What is Step 2 in drawing a trend line.

• Box in data.

• Make sure there are an even amount of points on each side.

• Draw the line of best fit all the way through graph.

• Find the number you are solving for and find the matching point.

Multiple Choice

What is Step 1 in drawing a trend line.

• Box in data.

• Make sure there are an even amount of points on each side.

• Draw the line of best fit all the way through graph.

• Find the number you are solving for and find the matching point.

Multiple Choice

What is Step 4 in drawing a trend line.

• Box in data.

• Make sure there are an even amount of points on each side.

• Draw the line of best fit all the way through graph.

• Find the number you are solving for and find the matching point.

Multiple Choice

What is Step 3 in drawing a trend line.

• Box in data.

• Make sure there are an even amount of points on each side.

• Draw the line of best fit all the way through graph.

• Find the number you are solving for and find the matching point.

Multiple Choice

If there are 10 people saving money, about how much money will they save.

• $140

• $170

• $100

• $110

Multiple Choice

The graph below shows the number of donuts the dance team sold. If the trend continues, how many donuts will be sold in 1.5 hours?

• 125

• 90

• 180

• 100

Multiple Choice

Mary's progress from a 10-kilometer race is displayed in the graph below.

Based on the graph, if Mary's runs in a 5-kilometer race and she maintains the same pace, how many minutes will it take her to run 5-kilometers?

• 25 minutes

• 50 minutes

• 30 minutes

• 45 minutes

Mean Absolute Deviation

MAD

Multiple Choice

What is the 1st step to solving MAD?

• Find the distance from the data point to the mean.

• Find the Mean of the Data points.

• Find the mean of the distances.

Multiple Choice

What is the 2nd step to solving MAD?

• Find the distance from the data point to the mean.

• Find the Mean of the Data points.

• Find the mean of the distances.

Multiple Choice

What is the 3rd step to solving MAD?

• Find the distance from the data point to the mean.

• Find the Mean of the Data points.

• Find the mean of the distances.

Multiple Choice

Victoria kept track of the number of minutes she practiced this week for basketball. What is the mean absolute deviation of the number of minutes she practiced? (Round your answer to the nearest hundredths)

• 16.5

• 15.6

• 17.8

• 18.7

Multiple Choice

A gardener plants sunflower seeds in two different types of soil and records the heights of the plants in inches after two months as shown below.

Soil 1: 25, 30, 35, 25, 20

Soil 2: 15, 25, 35, 30, 20

Which statement is correct?

• Soil 1 has a greater mean and a greater MAD than soil 2.

• Soil 2 has a greater mean and a greater MAD than soil 1.

• Soil 1 has a greater mean than soil 2. Soil 2 has a greater MAD than soil 1.

• Soil 2 has a greater mean than soil 1. Soil 1 has a greater MAD than soil 2.