If a vertical line, within the domain of the function, intersects the graph in more than one points, it is not a function.
If a vertical line, within the domain of the function, intersects the graph in more than one points, it is not a function.
Draw a vertical line if the line hits more than one point on the graph then it is not a function.
Determines whether a given mathematical expression is a function or not.
Any n x n (square) matrix have a determinate. If it's not a square matrix, we don't have a determinate, or rather we don't care about the determinate since it can't be invertible.
line graph or a scatter plot.
A logical function, such as the IF function.
The answer depends on what you mean by "without any math". Is deciding whether a number is positive or negative disallowed because the sign of a coefficient is a mathematical concept.
Babies are made the same way, whether you are in a relationship or not.
Yes. It can give insight as to whether there is a relationship between two variables, and if so, whether the relationship is direct or indirect; whether it is linear, polynomial, exponential, logarithmic; whether or not there are asysmptotic values; whether or not there is clustering; etc.
if it has a question mark rather than =
The horizontal line test is used to determine whether a function is one-to-one and if it had a inverse.
You should discuss whether he believes that he is in an exclusive or an open relationship with you. You can then decide whether his concept of the relationship agrees with yours.