Question

Which of the following does not represent a function?
Answer

x 4 5 6 8 10
y 4 -4 12 -8 6

x -10 1 3 8 10
y -2 2 7 8 10

x 5 10 10 12 18
y 1 4 22 5 4

x -12 -5 11 14 17
y -5 -2 -2 8 34

Answer 1

choice C is NOT a function since the x value of 10 maps to both 4 and 22 at the same time

Answer 2

3rd one mate, cant have same number mapping to two different answers

Answer 3

It would the third choice because here two points share the same x value and for a function that cannot happen.

Answer 4

How about this one?

Which of the following does not represent a function?
Answer

graph of a negative parabola oriented about the y axis with y intercept at positive 6

graph of an absolute value function

graph of an ellipse with y intercepts negative 7 and positive 7

graph of a line with a positive slope and y intercept of negative 6

Answer 5

again choice C since any ellipse will fail the vertical line test

Answer 6

Is the following relation a function?

two ovals, one labeled x and the other labeled y. The -2 in the x oval is pointing to the 8 in the y oval, the 0 in x is pointing to 1 in y, 5 in x pointing to3 in y, and 7 in x pointing to 5 in y

Answer 7

do you see any x value mapping to more than one y value?

Answer 8

No...?.

Answer 9

so this means that this is a function

Answer 10

Give an example of a situation where finding the cross product of two sets is useful and explain why it is useful. Your example should include two sets and their cross product.

Answer 11

if there is any case where one x value maps to more than one y value, then it cannot be a function

Answer 12

think of any two items that can be paired together

Answer 13

2 and 4.