Linear inequality plot with shading

Question

I simply want to show a linear equation -2x + 7 >= y with one side of the line shaded. I've tried various filledcurve iterations to no avail. Something so simple shouldn't be this difficult methinks.

Answer 1

Please do a reasonable search before you ask and provide your (non-working) code. Have you checked help filledcurves? What exactly is not clear there? Check the example below:

Code:

### fill area below or above curve
reset session

set grid x,y front
set style fill solid 0.3

f(x) = -2*x+7

plot f(x) w filledcurves x1 lc "red", \
     f(x) w filledcurves x2 lc "green", \
     f(x) w l

### end of code

Result: