Answer:
Negative slope
Step-by-step explanation:
It is negative.
x = 15
x/3 + 10 =15
Subtract 10 from each side
x/3+10-10 =15-10
x/3 = 5
Multiply each side by 3
x/3*3 = 5*3
x=15
84.6 km2 is the answer
