# List of functions used for tangent/normal 2D.
# An item in this list will be picked randomly at each exercise.
# Structure of item: multi-line.
# line 1 is function description.
# line 2 is derivative.
# line 3 is proportionality
# The rest is values for parameters c1, c2, etc.

:c1*t^2+c2
 2*c1*t
 1.5
 0.3,0.4,0.5,0.6,0.7,0.8,0.9,1.1,1.2,1.3,1.4,1.5,1.8,2
 0.5,0.7,0.8,1,1.2,1.5,1.8,2,2.5,3
:c1*t+c2
 c1
 1.5
 -1.2,-1.1,-0.9,-0.7,-0.6,-0.5,-0.4,-0.3,-0.2,0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9,1.1,1.2,1.3,1.4,1.5,1.8,2
 0.3,0.4,0.5,0.6,0.7,0.8,1,1.2,1.5,1.8,2

