Answer:
The numbers:
1, -3, 2, -9, 3, -15, 4, -21,
are not linear.
Step-by-step explanation:
If it was linear:
4, 3, 2, 1, -3, -9, -15, -21
6
as the following pic you can see the answer.
#diameter is 8 so radius is 4
25%
125:500
divide by 5 to make 500 into 100
25:100
convert to percent
$52.50