# math 6 - Exam I - Review 1. Find the equation of the line...

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Exam I - Review 1. Find the equation of the line perpendicular to the line 2 x - y = 7 and passing through the point ( - 2 , 1). 2. Find the equation of a horizontal line passing through the point (5 , 2). 3. Find the equation of a vertical line passing through the point (5 , 2). 4. Sketch the graphs of the equations you found in the ﬁrst three exercises, and label them L1, L2, and L3, respectively. 1

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5. Breaking Even The cost of producing x many teapots is given by C ( x ) = 5 x + 25. The revenue is given by R ( x ) = 8 x . (Where cost and revenue are in dollars.) a. Find an equation for proﬁt. b. How many teapots must be made and sold to break even? c. How many teapots must be made and sold to make a proﬁt of \$1000? 2
Let the supply and demand functions for Cheez-its be given by p = S ( q ) = 2 . 5 q - 2 p = D ( q ) = 6 - 2 q a. Sketch the graphs of these functions. b. Find the equilibrium quantity and the equilibrium price and mark the corresponding point on your graph. 3

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## math 6 - Exam I - Review 1. Find the equation of the line...

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