Which of the following expressions represents a function?

x2 + y2 = 9
{(4, 2), (4, –2), (9, 3), (9, –3)}
x = 4
2x + y = 5

Question

samdiaz0511 samdiaz0511

15-07-2017
Mathematics

contestada

Which of the following expressions represents a function?

x2 + y2 = 9
{(4, 2), (4, –2), (9, 3), (9, –3)}
x = 4
2x + y = 5

Respuesta :

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jimthompson5910 jimthompson5910 · Answer 1 · 2017-07-15T00:28:06+02:00

A. Not a function because it's a circle that doesn't pass the vertical line test

B. Not a function because we have x = 4 repeated more than once. Same for x = 9 as well.

C. Not a function. Any vertical line fails the vertical line test. Any vertical line is therefore not a function.

D. This is a function since it passes the vertical line test.

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In summary, the final answer is choice D

asiafloren asiafloren · Answer 2 · 2018-09-11T21:02:47+02:00

asiafloren asiafloren

11-09-2018

D is the correct answer the other person who answered explains why.

Answer Link

Which of the following expressions represents a function? x2 + y2 = 9 {(4, 2), (4, –2), (9, 3), (9, –3)} x = 4 2x + y = 5

Respuesta :

Otras preguntas

Which of the following expressions represents a function?

x2 + y2 = 9
{(4, 2), (4, –2), (9, 3), (9, –3)}
x = 4
2x + y = 5