Question

2 questions? Look below. Medal/fan to first person who answers!

Answer 1

@kewlgeek555

Answer 2

@timo86m

Answer 3

So you'd like for us to focus on that "average rate of change" problem (#4)?

Answer 4

and the other one too. #5, i changed the previous one. I need both #4 and 5

Answer 5

if you only know #4 then thats fine

Answer 6

Please post just one problem at a time, so potential helpers don't need to ask you which one you want to discuss.

The formula for "average rate of change" is

\[a.v.r.=\frac{ f(b)-f(a) }{ b-a }\]
You don't know what f(x) is, but the graph tells you all you need to know.

to find out where you're coming from: please identify the values of a and b from the graph.

Answer 7

1 and -2 are the only points. so i guess they are a and b

Answer 8

Prefer you know, rather than guess!

Please read the instructions for #4. What do they say? I ask because 1 and -2 are not the values of a and b.

Answer 9

Using the graph, Calculate the average rate of change from x=0 to x=2.

Answer 10

for f(x)

Answer 11

The question asks you to calculate the average value of the function for which the graph is given, on the interval [0,2]. With this in mind, please identify the values of a and b.

Answer 12

what does "the interval 0,2" mean

Answer 13

I think first we need to know the equation.

Answer 14

I'm afraid we'd have to go back and review several key concepts before this is going to make sense to you. Have you any examples at all of "finding the average value of a function" to which you could refer? Do you hae the time and are you willing to go over the background material before we try to answer this present question? I would hope that you'd understand what "interval" means in this context.

Answer 15

why can't you just explain it

Answer 16

I just wanted someone to write out how to do this, show me step by step

Answer 17

I think your making it too complicated then it already is. because in my lesson, we don't use the word interval.

Answer 18

@aprilann143 can you help with #5? or #4?

Answer 19

we are just supposed to use slope for this, not any complicated formula.

Answer 20

going through the problem step by step won't do you much good if you don't already understand the concept of "interval" and that if the interval is [0,2], a=0 and b=2.

I see you've chosen to address my concerns by going elsewhere. If you'd like to resume work on this problem with me later, message me.

Answer 21

oh, i get that now

Answer 22

so x= 0, x= 2, just means the interval (0,2). that's also called a point u know

Answer 23

The formula I gave you for the average rate of change is the proper formula, and it does represent the slope of a line.

I'll give you a couple of clues: a=0, the left end of your interval. b=2, the right end of your interval. What is b-a?

Now look at the graph. When a=0, what is f(a)? Hint: when x=0, what is f(0)?

Answer 24

As before, I ask you to re-read the problem statement. That statement says, "from 0 to 2." That's your interval. Your a=0 and your b=2. You will definitely need to know this in the future.

Answer 25

oh

Answer 26

So, if we are to move from 0 to 2, a=0 and b=2, and b-a=2-0=2, right?

Answer 27

a-b=-2, but I asked for b-a=2.

Answer 28

Now copy down the formula I gave you. Replace "b-a" by 2, ok?

Answer 29

done

Answer 30

Now, plese look at that graph again. we need to find the value of f(x) when x = a = 0. If x=0, y appears to be .... what value?

Answer 31

uhh

Answer 32

r u talking about a point already on the graph or no

Answer 33

Actually, it's simply the point on the graph where x=0.
It happens that x=0 is the y-axis. At what value of y does the graph cross the y-axis?

Answer 34

-2

Answer 35

that's it. so, if a=0, f(a)=f(0)=-2.

Replace your f(a) in that formula by -2 now, please.

Answer 36

done

Answer 37

hey

Answer 38

Btw, the choices are:
A. x= -4
B. x= -2
C. x= 2
D. x= 4

Answer 39

wat dos Btw mean

Answer 40

by the way.

Answer 41

ok

Answer 42

\[a.v.=\frac{ f(b)-(-2)) }{ 2 }\] is what you should now have. do you have that?

Answer 43

yes

Answer 44

"what's a calcular"... wat wer u saying

Answer 45

look at ur name...

Answer 46

yea is it bad?

Answer 47

did you misspell it? maybe you meant to write "calculator"

Answer 48

No, I spelled it correctly. That is how Open Study spelled it. lol

Answer 49

weird

Answer 50

yea do u need help with a question?