Question 573454
Assume you mean
2x - 7y is less than or equal to 4 
:
2x - 7y <= 4
Subtract 2x from both sides
-7y <= -2x + 4
y has to be positive, multiply both sides by -1, this reverses the inequality sign
7y >= 2x - 4
divide both sides by 7
y >= {{{2/7}}}x - {{{4/7}}}; (the y = mx+b form, b = -4/7)
:
Your graph should look like this, shaded area at and above the line
{{{ graph( 300, 200, -6, 6, -4, 4, (2/7)x-(4/7)) }}}