Question 455362
I can't seem to figure this out. I don't know where I keep messing up. Can someone please help me with this?
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The line y=0.16x + 1.22 represents an estimate of the average cost of gasoline for each year. 
The line 0.14x - y = -1.30 estimates the price of gasolne in January of each year.
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Do you expect the lines to be intersecting, parallel, or perpendicular? Explain your reasoning.
Ans: Since one has a slope of 0.16 and the other has a slope of 0.14
they intersect.  Any two line with different slopes will intersect.
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Use the equations of the lines to determine if they are parallel. what did you find.?
{{{graph(400,300,-100,100,-10,10,0.16x+1.22, 0.14x+1.30)}}}
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Did your answer to part b confirm your expectation in part a? Yes
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cheers,
Stan H.
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