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September 1, 2014

Homework Help: math-algebra please help

Posted by Michelle on Tuesday, July 6, 2010 at 7:38pm.

The line y=0.15x+0.79

represents an estimate of the average cost of gasoline each year.

The line 0.11x-y=-0.85

estimates the price of gasoline in January of each year (“Consumer price index,” 2006).

a. Do you expect the lines to be intersecting, parallel, or perpendicular? Explain your reasoning.

b. Use the equations of the lines to determine if they are parallel. What did you find?

c. Did your answer to Part b. confirm your expectation in Part a?

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