Probem62+Julie+Sam+O,+Jana

The graph they give c(v) is in gallons/ hour. But the question asks for you to be in gallons per mile.

Fractor label method __gallons__ x __h__our = __galllons__ hour mile mile

gallons per hour, is what they give you c(x) and hour of a mile is 1/x so the above equation translates to c(x) x (1/x) = g(x) ..... g(x) = c(x)/x...

the minimum occurs when the slope of c(x)= 1, maybe when the velocity is around 60? because when the of c(x)/x decreases more than the bottom, the function is decreasing.. at when the top is increasing more than the booum its increasing..

.. some thoughts?

Julie- all i did was set up what it should be...

G=fuel consumption=gal/mile c(consumption)=gal/hour v(speed)=m/h

(c/v)=(gal/hr)x(hr/mile)=(gal/mile)

G=(c/v)

c'(v)=0, when v=30 c'(30)=0

???? After that I have no idea, there needs to be some equation for that line...