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(c) m = −5, P ( 3, 2 3)
7
√
(b) m = − 2, P (0, −3)
(d) m = 678, P (−1, −12)
2. Find the slopeintercept form of the line which passes through the given points.
(a) P (0, 0), Q(−3, 5) (c) P (5, 0), Q(0, −8) (b) P (−1, −2), Q(3, −2) (d) P (3, −5), Q(7, 4) 3. Water freezes at 0◦ Celsius and 32◦ Fahrenheit and it boils at 100◦ C and 212◦ F.
(a) Find a linear function F that expresses temperature in the Fahrenheit scale in terms of
degrees Celsius. Use this function to convert 20◦ C into Fahrenheit.
(b) Find a linear function C that expresses temperature in the Celsius scale in terms of
degrees Fahrenheit. Use this function to convert 110◦ F into Celsius.
(c) Is there a temperature n such that F (n) = C (n)?
4. A salesperson is paid $200 per week plus 5% commission on her weekly sales of x dollars.
Find a linear function that represents her total weekly pay in terms of x. What must her
weekly sales be in order for her to earn $475.00 for the week?
5. Jeﬀey can walk comfortably at 3 miles per hour. Find a linear function d that represents the
total distance Jeﬀey can walk in t hours, assuming he doesn’t take any breaks.
6. Carl can stuﬀ 6 enve...
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 Fall '13
 Wong
 Algebra, Trigonometry, Cartesian Coordinate System, The Land, The Waves, René Descartes, Euclidean geometry

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