<PRE><B>Question 577304</B>
The line y=0.15x + 0.79 represents an estimate of the average cost of gas each year. The line 0.11x - y= -0.85 estimates the price of gas in January of each year. 
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y = 0.15x+0.79
y = 0.11x + 0.85
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a) Do you expect the lines to be intersecting, parallel, or perpendicular? Why?
The slopes are different so the lines will intersect.
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b) Use the equations of the lines to determine if they are parallel. What did you find?
They are not parallel.
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c) Did your answer in part b confirm your expectation from part A?
Yes
Cheers,
Stan H.
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