Lesson 6: Practice Problems

Problem 1

Which of these statements is true about the data in the scatter plot?

A scatter plot with a scale of 0 to 20 on the horizontal axis and 0 to 60 on the vertical. The data starts on the top left and goes down to the bottom right.

  1. As increases, tends to increase.

  2. As increases, tends to decrease.

  3. As increases, tends to stay unchanged.

  4. and are unrelated.

Problem 2

Here is a scatter plot that compares hits to at bats for players on a baseball team.

Describe the relationship between the number of at bats and the number of hits using the data in the scatter plot.

A scatter plot comparing times at bat vs hits. There are two separate clusters of data.

Problem 3

An image of a butterfly.

The linear model for some butterfly data is given by the equation . Which of the following best describes the slope of the model?

A scatter plot of wingspan (mm) vs body length (mm). Data has a big cluster with other data scattered.

  1. For every 1 mm the wingspan increases, the length of the butterfly increases 0.238 mm.

  2. For every 1 mm the wingspan increases, the length of the butterfly increases 4.642 mm.

  3. For every 1 mm the length of the butterfly increases, the wingspan increases 0.238 mm.

  4. For every 1 mm the length of the butterfly increases, the wingspan increases 4.642 mm.

Problem 4 From Unit 6 Lesson 4

Nonstop, one-way flight times from O’Hare Airport in Chicago and prices of a one-way ticket are shown in the scatter plot.

  1. Circle any data that appear to be outliers.

    A scatter plot of flight time (minutes) vs price (dollars) with a line of best fit.

  2. Use the graph to estimate the difference between any outliers and their predicted values.

Problem 5 From Unit 4 Lesson 14

Solve: