4. 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?

Question

4.	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?

anonymous · Answer

Hope the attached plot will help you.  The red line is the average cost of gasoline each year and the blue one is the January price of gasoline each year.