Is the function represented by the table non-linear?

The answer is A:

Step-by-step explanation: Yes, because it has a constant rate of change.

#3 no because it doesnt have a constant rate of change

We know that
A simple formula for the area of a rhombus when you know the lengths of the diagonals is half the product of the diagonals

Area=d1*d2/2
d1=500 yd
d2=800 yd

1 mile is equal to > 1760 yd
x mile> 500 yd
x=500/1760> x=0.2841 mi

1 mile is equal to > 1760 yd
x mile> 800 yd
x=800/1760> x=0.4545 mi

Area=(0.2641*0.4545)/2> 0.06 miles²

the answer is
0.06 miles²