Question

I know this is a lot of questions but i don't understand please help

Answer 1

21. C

22. B

23. D

Explanation:

21. For a function, every input must have a unique output so II is not a function

22. Domain is the no. of bird houses: 0 to 15

Range is the time: (0×20) to (15×20)

23. No. of apples is whole numbers

First x value is 0

f(0) = 0.1(0) + 5 = 5

Answer 2

21.C

23.B

24.D

Explanation:

Domain is x

Range is y

If you can find a relation between x and y, that relation is a function.

In 21,

I. y = 0.x +5

II. Nothing.

III. y = x

In 22,

15 birdhouses needed to be built, then domain is from 0 - 15

In 23,

Try to insert x in to f(x) you will find out f(x), for i.e : x = 0, f(x) = 0.10 x 0 +5 =5.