2
C(v) = 0.045 v - 6.75 v + 393
where v is the car velocity (in km/h) and C(v) is the
emission per km, measured in gram. The formla is valid for the velocity
range from 0 to 120 km/h.
This curve is of the type
2
y(x) = a x + b x + c
and shown below (red curve).
Your job: play with the sliders and adjust the red curve to match the green one.