18.5 would be the answer and here’s my work
Both exponential i.e 5 ^x
A is true, surprisingly.
B cannot be true, it alternates.(rule of indices negatives by positive exponent = positive, negative by negative , but -5 x -5 x -5 = + 5)
I'm only imaginging, but C must be right, since it increases exponentially, as opposed to D which only increases quadratically.
I think it is the Associative Property of Addition.
I think this would be (y = -2x + 9). Let me know if it is right!
