Can someone do a, b, and c?​

Koji is installing a rectangular window in an office building. the window is 823 feet wide and 534 feet high. the formula for the area of a rectangle is a=bh. what is the area of the window? enter your answer as a mixed number in simplest form in the box. $$ ft2

Find the slope of the line that passes through the points (-3, -1) and (0, 3). 3/4 0 4/3

Me because i don't understand how to do it.: )