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 Depdendent Variable

 Number of equations to solve: 23456789
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 Dependent Variable

 Number of inequalities to solve: 23456789
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# Linear Equations

1. [2 Points] Write the slope-intercept form of the equation of the line through the point
(5,−1) that is parallel to the line through the points (-3, 8) and (7, 4).

ANS: __________

2. [3 Points] The sales of a small software company are a linear function of time. Sales
were \$120,000 in 1999 and \$180,000 in 2003. If the linear trend continues, in which year
will the annual sales reach \$240,000?

ANS: __________

3. [5 Points] Only four of the following five points are on the same line. Which point is
not on the line determined by the other four?

ANS: __________

1. [2 Points] Write the slope-intercept form of the equation of the line through the point
(5,−1) that is parallel to the line through the points (-3, 8) and (7, 4).

 Solution: Slope of line between (-3, 8) and (7, 4) The point-slope equation of the line through (5,−1) is

ANS:

2. [3 Points] The sales of a small software company are a linear function of time. Sales were
\$120,000 in 1999 and \$180,000 in 2003. If the linear trend continues, in which year will the
annual sales reach \$240,000?