SOLUTION: 4. The line y=0.15x+0.79 represents an estimate of the average cost of gasoline for each year. The line 0.11x-y=0.85

Question 389680: 4. The line
y=0.15x+0.79
represents an estimate of the average cost of gasoline for each year. The line
0.11x-y=0.85
estimates the price of gasoline in January of each year (Bureau of Labor Statistics, 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 intersecting, parallel, or perpendicular. What did you find?
c) Did your answer to part b confirm your expectation in part a?

Answer by richard1234(7193) (Show Source): You can put this solution on YOUR website!
The lines intersect since they have different slopes (the second equation can be rewritten as y = 0.11x - 0.85).
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