Think about the signs of the factors and the signs of the product in the multiplication problems. how do the signs of the numbers you are dividing relate to their quotients

  An odd number of minus signs in a multiplication or division problem means the result will be negative.

Step-by-step explanation:

Any even number of minus signs will cancel, so the result will be negative if and only if the number of negative operands is odd.

(d)

step-by-step explanation:

given: the line in the graph passes through points (5,30) and (6,26).

then, the equation of line is:

now, put y=a(n) and x=n,

hence, option d is correct.