How can you tell if an algebraic relation is a function?

A function is a relation in witch each domain [x-value] has exactly one range [y-value].

For example:

[(3,2) (5,3) (2,6) (1,3)] Would be a function because no x-values repeat in the relation. It's inputs have one output.

[(3,2) (5,3) (5,6) (1,3)] Would not be a function because the x-values repeat in the function. The "5" inputs have two outputs.

Brainilest is appreciated.

x=-2

infinite number of lines, so there is an infinite number of equations.

step-by-step explanation:

there are an infinite number of line that passes through the point (-2,5)

x=-2   is one line that passes through the point

y = 5 is another line that passes through the point

(these two lines are perpendicular to each other).

since the number of   numbers are infinite and the slope is the ratio of two numbers,(change in y over change in x) we can have an infinite number of slopes.     our only condition is that it passes through the point (-2,5)

cut 138 centimeters off

step-by-step explanation:

250-112 = 138