Question

Which of the following expressions represents a function?

a) x=1
b) {(3,2),(3,-2),(4,5),(4,-5)
c) y=4x-1
d) 4x^2 + y^2 = 16

Answer 1

function meaning graph?

Answer 2

not exactly sure

Answer 3

a c d are graphs.b is coordinates

Answer 4

By the way you look like Kim Kardashian in the photo

Answer 5

what do you think which one is correct ?

Answer 6

@jim_thompson5910

im not sure about any of this

Answer 7

C, because a function by definition is one where the there is only 1 solution (y value) for an x coordinate. x=1 is a 1 to many, d is many to many, and b is a list i think.

Answer 8

f(x) = x^2 +1 where y=f(x)
this type of equation is called function
now guess what is the correct answer

Answer 9

@Barrelracing tell me ?

Answer 10

c

Answer 11

yes correct

Answer 12

Let's go through the choices


a) x=1

this is NOT a function because it plots a vertical line. All vertical lines are NOT functions.

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b) {(3,2),(3,-2),(4,5),(4,-5)

This is NOT a function either. The points (3,2) and (3,-2) violate the vertical line test.

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c) y=4x-1

This is a function because each x value plugged in produces exactly one y value. The graph passes the vertical line test because any given vertical line only passes through exactly 1 point.

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d) 4x^2 + y^2 = 16

This makes a circle. It is possible to draw a vertical line through more than one point on this circle. So it fails the vertical line test and it is NOT a function.

Answer 13

Well technically d is an elipse...

Answer 14

oh right, my bad