Algebra
16 Online
OpenStudy (anonymous):
What is the average rate of change from x = −3 to x = 5?
−1
0
1
8
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OpenStudy (anonymous):
OpenStudy (anonymous):
@nincompoop
OpenStudy (anonymous):
@acxbox22
OpenStudy (abdullahm):
What are the y-values when x=-3 and x=5
OpenStudy (anonymous):
um i dont knew how to find those
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OpenStudy (abdullahm):
So, go to your graph and see when x=3, what the y-value is on the line.
OpenStudy (anonymous):
y is -1?
OpenStudy (abdullahm):
Correct, y=-1 for both x=-3 and x=5
OpenStudy (abdullahm):
Do you know the slope formula?
OpenStudy (acxbox22):
y2-y1 average rate of change= -----
x2-x1
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OpenStudy (abdullahm):
Or, do you know the property of the slopes of horizontal lines?
OpenStudy (acxbox22):
or like said, slope
average rate of change between two points is just the slope of the secant line going through the points
OpenStudy (anonymous):
so is it -1-(-3)
5-(-1)
OpenStudy (abdullahm):
No, it isn't. Make sure to put the points in the correct place in the formula.
OpenStudy (acxbox22):
no,
y2 is -1 and y1 is -1
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OpenStudy (anonymous):
-1-(-1)
-3-5
OpenStudy (acxbox22):
yes now what is it?
OpenStudy (abdullahm):
Note: x/ 0 = undefined
0/x = 0
OpenStudy (anonymous):
y=0
x=-8
OpenStudy (abdullahm):
And 0/-8 =?
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OpenStudy (acxbox22):
so 0/-8 which is equal to?
OpenStudy (anonymous):
so its 0
OpenStudy (abdullahm):
Correct
OpenStudy (anonymous):
is that the answer?
OpenStudy (abdullahm):
Yes.
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OpenStudy (anonymous):
thank you both of you
OpenStudy (abdullahm):
Anytime :)