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OpenStudy (anonymous):
HELP! FILE ATTACHED. WILL GIVE MEDAL!!
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OpenStudy (anonymous):
OpenStudy (anonymous):
What is the average rate of change for the relation shown below between x = -2 and x = 2?
Enter your answer as a reduced ratio, like this: 2/3
OpenStudy (anonymous):
@dan815
OpenStudy (anonymous):
@pooja195
OpenStudy (anonymous):
@Michele_Laino
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jimthompson5910 (jim_thompson5910):
Draw a vertical line through x = -2. Where does this vertical line cross the parabola?
OpenStudy (anonymous):
(-2,8)@jim_thompson5910
jimthompson5910 (jim_thompson5910):
how about for x = 2 ?
OpenStudy (anonymous):
(2,0)
jimthompson5910 (jim_thompson5910):
we have the two points (-2,8) and (2,0)
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jimthompson5910 (jim_thompson5910):
the average rate of change from x = -2 to x = 2 is the same as the slope through those two points
jimthompson5910 (jim_thompson5910):
use this slope formula
\[\Large m = \frac{y_{2}-y_{1}}{x_{2}-x_{1}}\]
OpenStudy (anonymous):
-8/4
jimthompson5910 (jim_thompson5910):
which reduces to what?
OpenStudy (anonymous):
-4
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OpenStudy (anonymous):
or is it -2
jimthompson5910 (jim_thompson5910):
-8/4 = -2
jimthompson5910 (jim_thompson5910):
the slope of the line through (-2,8) and (2,0) is -2
so the average rate of change is -2
OpenStudy (anonymous):
thank you so much! @jim_thompson5910
jimthompson5910 (jim_thompson5910):
you're welcome
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