Unit 4 Review

You want to by T-shirts for your companies party. The table shows the amount of t-shirts and the total cost.

Which statement is true about the association between the number of t-shirts and the total cost.

• There is not enough points to show and association.

• The cost varies no matter how many t-shirts are bought.

• There is a positive association.

• There is a negative association.

The table shows a relationship between the hours worked and the productivity of employees.

Which statement is true about the association between hours worked and employee productivity?

• There is not enough points to show an association.

• The productivity varies no matter how many hours are worked.

• There is a positive association.

• There is a negative association.

What conclusion can be made from the data?

• The height of the tree does not depend on the years.

• As the years increase the height of the tree decreases.

• As the years increase the height of the tree increases.

• As the years decrease the height of the tree decreases.

This scatter plot shows the afternoon temperature and the number of ice skaters who went to Belmont Pond on some Saturdays last winter.

What was the afternoon temperature on the day 50 skaters went to Belmont Pond?

Create a scatter plot using the table.

Does this scatter plot show a positive trend, negative trend, or no trend?

• Positive Trend

• Negative Trend

• No Trend

The two scatter plots below show the same data set. Chose the scatter plot in which the outlier is highlighted.

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What is the equation of the trend line in the scatter plot?

Enter your answer in slope-intercept form. Write any coefficients as integers, proper fractions, or improper fractions in simplest form.

Which graph shows the line of best fit for the data?

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Tracy and her friends are playing a game in which players use tiles with different point values to make words. This scatter plot shows the number of letters in Tracy's words and the number of points the word scored. it also shows the line of best fit.

The equation of the line of best fit is y = 4x + 0.75. According to the equation, which of these statements is true?

• A word with 4 letters would likely score about 75 points.

• A word with 11 letters would likely score about 45 points.