To find the inequality in the graph, you would need to do 2 things.
1. Find the equation for the function, which can be in the form, y = mx + b.
This can be found out, by using the 2 points in the graph, to find the slope.
M = change in y coordiantes/change in x coordiantes.
Since the graph is to the left, it would have a negative slope.
Check : m = 5-1/0-3 =4/-3.
Next we need to find the y intercept which would be 5.
So y = -4/3x + 5.
2. Since all points that are to the left of the line are included, it would be less than the function.
Y < -4/3x + 5.
Check : pick any other point in the shaded region and plug into the equation to see if the left side equals the right side.
If the inequality is true.