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Jeffry Ortiz
Wiki User
∙ 13y agoYes, the easiest way to test if a relation is a function is to graph it and see if, at any point, you could draw a vertical line that touches the graph in more than one place. Your particular function is a straight line so yes, it is a function.
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If x equals 4 and y equals 8 then 3x plus 8y equals?
8x8 = 64 so it is 64 (the y) 3x4 = 12 so it is 12 (the x) 64+12 is 76.
What are function and relation?
A function is an equation that gives a unique answer. A relation does not. Example: y = 3x + 1 is a function. If I give you x, you can determine y. And that y is unique to that x. So if x = 1, you know y = 4. No other of x gives y = 4 as an answer. So y = 3x + 1 is a function. Example: y = 4x2. So if I give you x = 1, y = 4. But y = 4 if I also give you x = -1. So y = 4x2 is not a function, it is a relation.
Is y equals 2x2 a function?
no
Is y equals x2 a function?
Y=X^2 is a function for it forms a parabola on a graph.
Is y equals 5 a function?
Yes, it is.
Relation is a function y equals -8?
determine whether each relation is a function y equals -8
If x equals 4 and y equals 8 then 3x plus 8y equals?
8x8 = 64 so it is 64 (the y) 3x4 = 12 so it is 12 (the x) 64+12 is 76.
Is x equals y a function?
y = x This is a line and a function. Function values are y values.
What are function and relation?
A function is an equation that gives a unique answer. A relation does not. Example: y = 3x + 1 is a function. If I give you x, you can determine y. And that y is unique to that x. So if x = 1, you know y = 4. No other of x gives y = 4 as an answer. So y = 3x + 1 is a function. Example: y = 4x2. So if I give you x = 1, y = 4. But y = 4 if I also give you x = -1. So y = 4x2 is not a function, it is a relation.
Is y equals 2x2 a function?
no
Is y2 equals x2 plus 4 a function or a relation?
First of all, ALL functions are relations, but not all relations are functions. To answer the question of whether or not this relation is a function, you want to know if any x value goes to more than one y value. In this case it is easy. Look at what happens when x=0. At x = 0, your equation becomes y^2=4. Both y=2 and y=-2 satisfy that equation. So x=0 goes to two different y values. It is a relation, but NOT a function.
How do you know that y is a function of x?
If you plug in y for the x function, and it equals the answer you got, it is right.
What type of function is represented by the equation y equals -2lxl?
y - |x| is an expression, not a function.
Is y equals x2 a function?
Y=X^2 is a function for it forms a parabola on a graph.
Is y equals 8 a function?
Yes.
Is y equals 5 a function?
Yes, it is.
Is y equals 11 a function?
Yes.
