Fuchsberg - GNUPlot

#!/usr/bin/env gnuplot
set key left
set encoding utf8
set xlabel 'Strecke [m]'
set ylabel 'Steigung [°]'
set xrange [0:700]
set yrange [0:17]
set grid mxtics mytics
set mytics 2
set grid

set terminal png size 420,340
set output 'plot.png'

f(x) = x**3/26250000-3*x**2/25000+433*x/5250

#Plot
plot (x >= 0 && x <= 700) ? f(x) : 1/0 title 'φ(t)'