Question 186346
F(x)=2x+1 when F=4
f(4)=2*4+1
f(4)=8+1
f(4)=9
{{{ graph( 300, 200, -6, 5, -10, 10, y = 9) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, y = 9).