Determine whether the relations represent y as a function of x.

Both of those are functions.

Step-by-step explanation:

is a parabola that opens up.

Any upward or downward parabola is a function because they pass the vertical line test.

Subtract 1 on both sides:

Multiply both sides by -1:

So this is a another parabola and it is faced down.  So this is also a function.

wit willl always be a parabola.  

If then it is open up.

If then it is open down.

Upwards and downward parabolas will always be functions.

are also parabolas but these open to the left or right.  These will not be functions because they will not pass the vertical line test.  

15%

step-by-step explanation:

use the table and count the number of guesses that has two correct answers.

the following are two correct answers

10010, 01100, 11000

a total of 3 numbers having 2 correct guesses out of 20 questions.

probability of getting 2 correct guesses = the number of questions getting 2 correct answers / total number of questions.

= 3/20

to convert it into percent multiply by 100, we get

= 3/20 * 100

= 15%

the answer is 15%

you.

1696 hundred thousand

step-by-step explanation: