Select all relations that represent functions.
(8,7), (7,8), (6,5), (5,6)
(-2,7), (-3,9), (-5,9), (-8,11)
(6,-6), (-3,12), (6,-1), (-8,13)

x y
-3 0
-5 8
-7 8
-9 0

x y
0 0.5
2 1
1 2.5
0 2

FIRST OPTION.

SECOND OPTION.

FOURTH OPTION.

Step-by-step explanation:

By definition, a relation is a function if an only if each input value ( each x- value) has only one output value (y-value).

Based on this you can identify that:

1. The relation  is a function.

2. The relation is a function.

3. The relation is not a function, because the input value 6 has two different output values:

4. The first table represents a function.

5. The second table does not represent a function, because the input value 0 has two different output values:

- 70

this is the answer for you hope it

b. 6

step-by-step explanation:

we are given the table representing an exponential function.

we can see from the table that, as x is increasing, the value of y is increasing in the power of 6.

i.e. the following relation is obtained,

x = 1, y = 6

x = 2, y = 36 =

x = 3, y = 216 =

x = 4, y = 1296 =

x = 5, y = 7776 =

so, the geometric series obtained is .

thus, the common ratio is given by = = 6.

hence, the common ratio is 6.