Question

Help in algebra PLZ!!!!!!!!

Answer 1

what's the question

Answer 2

Need help in part C

1. The table below shows the values of y for each value of x.
X Y
-1 0
1 -1
2 1
2 -2

Part A: Does the table represent a function? Justify your answer by using the values shown in the table (4 points)
Part B: The function f(x) shown below represents the number of field goals Frank made at different distances, x, in meters, from the post.
F(x) = -x + 8
Calculate and interpret the meaning for f(5). (4 points)
Part C: Write an ordered pair to represent the input and output of the function in Part B when Frank is at a distance of p meters from the post. (2 points)
Part A:
Is the table a function? Yes
Justify your answer- use specific values in your answer.

-1 +1=0
1+1=2
2+2=4
4+2=6
Part B: Calculate f(5).
What does f(5) mean? f(5) means substituting 5 for x.
Part C: X represents meters from the post.
If we replace x with p, what is the y-coordinate? Write your ordered pair below:
(p, )

Answer 3

for part A, they want you to remember that if you have the *same* x but different y, then you do NOT have a function.

Answer 4

ok

Answer 5

For part A, what are the last 2 lines in the table ?

Answer 6

There aren't any, that's it

Answer 7

X Y
2 1
2 -2

do you see x=2 y=1 and x=2, y=-2
same x, different y's
is that a function ?

Answer 8

No

Answer 9

ok. so you got part A correct. It is not a function (because you have the same x with 2 different y values)

Answer 10

Did you do Part B

F(x) = -x + 8
Calculate and interpret the meaning for f(5).

Answer 11

No I don't get it, I tried doigng it but I know its wrong

Answer 12

what did you do ?

Answer 13

well I don't know how to calculate f(5) and it said what does f(5() mean and I said it means substituting 5 for x

Answer 14

do you get the idea that
f(x) is the "short name" for the formula -x+8
f(x) = -x+8
short name = formula

***
I said it means substituting 5 for x
***
ok. and what do you get if you do that ?

Answer 15

f(x)= -5+8?

Answer 16

yes. now simplify

Answer 17

though I would write it
f(5) = -5+8 (notice it's f(5) not f(x) )

Answer 18

f (5)=3

Answer 19

yes

Answer 20

f(5) means when x is 5, we calculate (using the formula -x+8) to get 3

Answer 21

oh ok

Answer 22

so that's for part b right?

Answer 23

to make more sense , we have to read what they say
The function f(x) shown below represents the number of field goals Frank made at different distances, x, in meters, from the post.

Answer 24

the "5" in f(5) stands for the 5 meters from the post.
f(5)= 3 is the number of field goals Frank makes when 5 meters from the post.

Answer 25

Now I get it

Answer 26

Part C
Write an ordered pair to represent the input and output of the function in Part B when Frank is at a distance of p meters from the post.

ordered pair means (x, f(x) ) pair
for this problem, what is x? hint: it is not a number

Answer 27

is it p?

Answer 28

yes. Frank is "p" meters from the post. p is the name for an unknown number.

now figure out f(p)

Answer 29

use the same idea as when you did f(5)

Answer 30

do I use the same formula -x+8?

Answer 31

yes. f(x) is short for : use -x+8

Answer 32

the idea is replace "x" with "p"

Answer 33

oh ok: f(p)= -p+8?

Answer 34

yes, or 8-p (means the same thing)

now write the "order pair"

Answer 35

I don't know

Answer 36

ordered pair means (x, f(x) ) pair

but use p and f(p), and for f(p) use your result -p+8

Answer 37

so like this (p, -p+8)

Answer 38

exactly

Answer 39

Yay im learning!

Answer 40

would you mind helping me with 4 more? they are like this...