Which relation is a function

A function is a relation in which each possible input value leads to exactly one output value.The input values make up the domain, and the output values make up the range.

Step-by-step explanation:

+25 = x

step-by-step explanation:

here x is the hypotenuse of a right triangle whose legs are 7 and 24.   by the pythagorean theorem, 7² + 24² must equal x²:

x² = 49 + 576 = 625.   thus, x = +√625 = +25 = x

answer: you need to organize this better it does not make sense.

step-by-step explanation: ?