MATH115
HW3
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1. Sketch the graph of !}le circle x 2 - Sx
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2., Find the equation for the circle of radiu~ 7 centered at (-2, 5).
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4. a. Find an equation for the line that goes through the points ( 4,
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b. Find an equation for a line parallel to your line from part (a) that is 9 units away.
c. Find an equation for a circle in between your lines that touches each of them once.
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5. Suppose that a tour prices their tickets at $10.00 and sells 435 tickets. For every ten cents they
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lower the price, they sell 6 more tickets.
a. Write a linear equation that relates price to sales.
b. Find and interpret the slope.
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c. Find and interpret the x-intercept.
d. Find and interpret they-intercept. .
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