3.1 i think but hopefully that might help
A function for which every element of the range of the function corresponds to exactly one element of the domain. One-to-one is often written 1-1. Note: y = f(x) is a function if it passes the vertical line test.
A because, all the numbers multiplied by those factors equals their spot in the number
Answer:
because they are both in the circle
Step-by-step explanation: