A linear inequality in slope-intercept form that represents the relationship shown on the graph is y < 7/3(x) - 4.
In Mathematics and Geometry, the point-slope form of a straight line can be calculated by using the following mathematical equation (formula):

Where:
- x and y represent the data points.
- m represent the slope.
First of all, we would determine the slope for this graph by using these points (-3, 3) and (0, -4);

Slope (m) = (-4 - 3)/(0 - 3)
Slope (m) = -7/-3
Slope (m) = 7/3
At data point (0, -4) and a slope of 7/3, a linear inequality for this line can be calculated by using the point-slope form as follows:

y + 4 = 7/3(x - 0)
y = 7/3(x) - 4
y < 7/3(x) - 4 (since the line is a dashed line and shaded below).