rewrite this in standard form:
(0,5) m=- 3/5
I assume you mean that a straight line goes through (0,5) and the slope, m = -3/5
well (0,5) is on the y axis where x = 0
therefore it is in fact the y intercept, often called b, in y=mx+b
so one way to write the equation is
y = (-3/5) x + 5