Please help. I don't know how to do this yet! (Plus, I'm pretty sure you have to use the product of a single digit and a power of 10 rule thing)

Multiplying an even number of negative numbers gives an answer that is choose from:

Aboat's value over time is given as the function f(x) and graphed below. use a(x) = 400(b)x + 0 as the parent function. which graph shows the boat's value increasing at a rate of 25% per year?

Quadrilateral wxyz is on a coordinate plane. segment yz is on the line x+y=7 and segment xw is on the line x+y=3. which statement proves how segments yz and xw are related