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Chapter 12: Q. 7 (page 713)
Which of the following equations are linear?
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The price of a single issue of stock can fluctuate throughout the day. A linear equation that represents the price of stock for Shipment Express is where x is the number of hours passed in an eight-hour day of trading.
What are the slope and y-intercept? Interpret their meaning.
Use the following information to answer the next five exercises. A random sample of ten professional athletes produced the following data where is the number of endorsements the player has and is the amount of money made (in millions of dollars)
| x | y | x | y |
| 0 | 2 | 5 | 12 |
| 3 | 8 | 4 | 9 |
| 2 | 7 | 3 | 9 |
| 1 | 3 | 0 | 3 |
| 5 | 13 | 4 | 10 |
.When and,are the data significant? Explain
Does the scatter plot appear linear? Strong or weak? Positive or negative?
For a given line of best fit, you computed that using data points and the critical value is . Can the line be used for prediction? Why or why not?
Table 12.20 shows the life expectancy for an individual born in the United States in certain years.
a. Decide which variable should be the independent variable and which should be the dependent variable.
b. Draw a scatter plot of the ordered pairs.
c. Calculate the least squares line. Put the equation in the form of: \(\hat{y}=a+bx\)
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