What do the places mean? I’d say the signs are negative since both values are (-3) and (-5), but i don’t know what you mean by placed - if they were placed in a number line, it would go 3 and 5 values left or down.
The answer is 1/20 .............
480,000,000 (480 million)
(8-7)/(-3-0)= -1/3
the slope is -1/3