Slope= y2-y1/x2-x1
so
slope=9-7/7-9
slope=-1
What is the question you are struggling with I will try and help.
Point form(-4,-2) or equation form x=-4,y=-2
1.5 deep.
you subtract 2.25 of air space from the total depth 3.75
3.75-2.25=1.5
1/8 because if u simplify your answer..to have 4 as the denominator it would work easier
