Question

Determine which ordered pairs fall on the graph of f(x) = -2x-1

Show all of your work for each ordered pair.

Ordered Pairs:

(1,1)

(-1, -4)

(-2, -1/8)

(0,1/2)

Send help ASAP pls

Answer 1

No order Pair fall on the graph

Explanation:

The given Function is

`f(x)= -2x -1` ...............(i)

Now to see whether these ordered pairs Lay on it we will put each ordered pair in the equation (i)

Lets take first ordered pair (1,1)

here x = 1

putting it in (i) gives

`f(1)= -2(1) -1`

`f(1)= -3`

this is not equal to 1 so the order pair (1,1) does not fall on function
`f(x)= -2x -1`

Lets take second ordered pair (-1,-4)

here x = -1

putting it in (i) gives

`f(-1)= -2(-1) -1`

`f(-1)= 1`

this is not equal to -4 so the order pair (-1,4) does not fall on function
`f(x)= -2x -1`

Lets take third ordered pair (-2,-1/8)

here x = -2

putting it in (i) gives

`f(-2)= -2(-2) -1`

`f(-2)= 3`

this is not equal to -1/8 so the order pair (-2,1/8) does not fall on function
`f(x)= -2x -1`

Lets take fourth ordered pair (0,-1/2)

here x = 0

putting it in (i) gives

`f(0)= -2(0) -1`

`f(0)= -1`

this is not equal to -1/2 so the order pair (0,-1/2) does not fall on function
`f(x)= -2x -1`