Which expression is equivalent to-8x-1y-9/-15x5y-3?

What is the equation in point slope form of the line that passes through the point (-1, -3) and has a slope of 4? y-1=4(x-3) or y+3=4(x+1)

The depth of a lake at a certain point, wich is a function of the distance of that point from shore, is 30 feet.

100 points, hi, i’m not sure how to get the equation from the graph and table.