Yes and no.
In two-dimensional Cartesian coordinates, the answer is usually yes. So the point (4,7) has x value 4 and y value 7.
But there are other uses for ordered pairs. For example in polar coordinates a point is specified by an ordered pair (r, theta), and the second number is an angle. You need to know what context you are working in.
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Evaluate the function at the first number in the pair. If the answer is not equal to the second value, then the ordered pair cannot be in the function.
y
The absolute value of a number is always nonnegative.
place value and face value of a number are always equal at ones place.
First value: abscissa, is the distance from the origin along the horizontal axis (usually the x-axis). Second value: ordinate, is the distance from the origin along the vertical axis (usually the y-axis).