Question 1104227
Application for a linear equation.
Your data points for ordered pair are x for miles driven, and y for volume of fuel in the tank.


The two points are  (120, 12) and (220, 8.66).
Find the equation of the line with these two points.


{{{(12-8.66)/(120-220)=3.34/(-100)=-0.0334}}}, slope


{{{y-12=-0.0334(x-120)}}}


{{{y=-0.0334(x-120)+12}}}


{{{y=-0.0334x+12+4.008}}}

{{{highlight(y=-0.0334x+16.008)}}}


Full tank holds 16 gallons of fuel.  (If you want to three significant figures).


Fuel Efficiency was {{{100/3.34=30}}}, THIRTY miles per gallon, (if to three significant figures, then 30.0 mpg).