Y=16500-1500x what does the slope represent and the y intercept

Slope= 1500x presents every time x goes over 1, y goes 1500.
Y-intercept= where the line starts

Thats where they was ported and the fields that noone really knew much about needed tended, so they put slaves out there do free work and huge profits and so on the north decided to hold its own and was more different way of survival did not have same climate conditions to afford protecting slaves from winter so expenses be diff from south