Function and Graph of Its Derivative

Project ID: 
7100020137
Accepted: 
SubArea: 
Type: 
Layout: 
Question: 
Match a function $f$ to the graph of its derivative $f'$. Each picture shows only a part of the graph of $f'$ within the square $[-2,2]\times [-2,2]$.
Question 1: 
$f(x)=\frac{\pi}2$
Answer 1 Image: 
Question 2: 
$f(x)=-x$
Answer 2 Image: 
Question 3: 
$f(x)=\frac{x^2}4$
Answer 3 Image: 
Question 4: 
$f(x)=\ln\,x$
Answer 4 Image: 
Question 5: 
$f(x)=\sin\,x$
Answer 5 Image: 
Question 6: 
$f(x)=\frac{x^3}6$
Answer 6 Image: 
Question 7: 
$f(x)=\cos\,x$
Answer 7 Image: 
Question 8: 
$f(x)=-\frac{1}{x}$
Answer 8 Image: 
Question 9: 
$f(x)=\mathrm{e}^{x-1}$
Answer 9 Image: