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Which of these equations represent functions? Check all that apply.
A.
y = x2
B.
y = 3x
C.
x2  y2 = 1
D.
y2 = x2
 one year ago
 one year ago
Which of these equations represent functions? Check all that apply. A. y = x2 B. y = 3x C. x2  y2 = 1 D. y2 = x2
 one year ago
 one year ago

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x1xofxaxkndxBest ResponseYou've already chosen the best response.0
thanks loli got 1 right
 one year ago

mathstudent55Best ResponseYou've already chosen the best response.1
c & d are not functions.
 one year ago

x1xofxaxkndxBest ResponseYou've already chosen the best response.0
dw:1357706214919:dw
 one year ago

mathstudent55Best ResponseYou've already chosen the best response.1
@ankolix A function is a realtion that maps each element of its domain to a single element of its range. A parabola that opens up or down is a function. A parabola that opens right or left is not a function.
 one year ago

mathstudent55Best ResponseYou've already chosen the best response.1
dw:1357706562084:dw
 one year ago

mathstudent55Best ResponseYou've already chosen the best response.1
An easy way to tell if a relation is a function from a graph is the vertical line test. Think of a vertical line moving from left to right on the graph. If in any position, the vertical line intersects more than one point of the relation, then the relation is not a function.
 one year ago

x1xofxaxkndxBest ResponseYou've already chosen the best response.0
thanks sooooooo much for the help!!!!!!!!!!
 one year ago

mathstudent55Best ResponseYou've already chosen the best response.1
You're very welcome.
 one year ago
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