how to graph a linear inequality
rearrange the equation so "y" is on the left and everything else on the right.
plot the "y=" line (make it a solid line for y≤ or y≥, and a dashed line for y< or y> )
shade above the line for a "greater than" (y> or y≥) or below the line for a "less than" (y< or y≤).
each day maria walks 0.75 miles, so if she walks for 4.5 days, then 0.75*4.5= 3.375 miles.