G
Guest
Guest
please help me dont understand it.....
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Here's a hint to get you started.
You know that a derivative is equal to 0 at the extrema(the high and low
points). Take a gander at the graph in d. See how many 'hills and
valleys' it has?.
Now, which corresponding graph crosses the x-axis(y=0) the same number of times?. Would it be III, perhaps?.
Try the others.
You know that a derivative is equal to 0 at the extrema(the high and low
points). Take a gander at the graph in d. See how many 'hills and
valleys' it has?.
Now, which corresponding graph crosses the x-axis(y=0) the same number of times?. Would it be III, perhaps?.
Try the others.
The derivative of a function gives us the slope of the curve of that function at any given point. Look for the peaks and valleys (as mentioned)...those have a slope of zero and therefore the graph of its derivative should cross the x-axis at that point.
Also look for where the curve of the function is steepest, the corresponding derivative curve will be a high positive or negative value depending on whether the function is increasing or decreasing.
Lastly, look for functions that are not continuous (not a smooth curve). A break in a smooth curve will not have a derivate at that point, therefore, not-continuous.
Also look for where the curve of the function is steepest, the corresponding derivative curve will be a high positive or negative value depending on whether the function is increasing or decreasing.
Lastly, look for functions that are not continuous (not a smooth curve). A break in a smooth curve will not have a derivate at that point, therefore, not-continuous.