Question

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

Answer 1

Answer:

No order Pair fall on the graph

Step-by-step 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 $f(x)= -2x -1$