- Write in standard form.
- Write an equation in slope-intercept form for a line perpendicular to containing (1, 2).
- Write an equation in point-slope form for a line containing (5, 3) and (–6, 0.5).
- What is the speed of a car travelling 80
*miles/hour*in*feet/second*? - How many kilometers are in a marathon (26.2 miles)?
- Lucas bought a 5-gallon container of paint. He plans to use gallon per room.
- Write an equation to represent this situation.
- How many rooms can Lucas paint before the container is empty?

- Are these two lines parallel, perpendicular, or neither? Explain your answer by showing your work: and .
- The table below gives the gross public debt of the U.S. Treasury for the years 2004–2007.
- Make a scatter plot of the data.
- Use the method of extrapolation to determine the gross public debt for 2009.
- Find a linear regression line using a graphing calculator.
- Use the equation found in (c) to determine the gross public debt for 2009.
- Which answer seems more accurate, the linear model or the extrapolation?

- What is the process used to interpolate data?
- Use the table below to answer the following questions.
- Draw a scatter plot to represent the data.
- Would a linear regression line be the best way to represent the data?
- Use the method of interpolation to find the percentage of mineral remaining when

## Texas Instruments Resources

*In the CK-12 Texas Instruments Algebra I FlexBook, there are graphing calculator activities designed to supplement the objectives for some of the lessons in this chapter. See http://www.ck12.org/flexr/chapter/9615.*

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## Date Created:

Feb 22, 2012## Last Modified:

Dec 11, 2014
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