## Fill in the Blanks

 One-to-One Relationship: $1$ input has only $1$ output and vice-versa. $y = x + 1$ is a relation where for every possible value of $x$, there is exactly one value of $y$ and vice-versa. Many-to-One Relationship: Many inputs could have the same output. However, $1$ input will result in only $1$ output. $y = x^2$. In this relations, $x = 2$ and $x = -2$, result in $y = 4$. So, many (more than one) values in $x$ could result in one $y$-value. $-3$