(1) \ \

\

Step 1:

\

Observe the graph.

\

The function f is increasing for the value of x between $\"\"$ to $\"\"$ , 1 to 3 and 6 to 7.

\

Therefore the function f is increasing over the intervals $\"\"$ , $\"\"$ and $\"\"$ .

\

Observe the graph.

\

\

The function f is decreasing for the value of x between $\"\"$ to 1 and 3 to 6.

\

Therefore the function f is decreasing over the intervals $\"\"$ and $\"\"$ .

\

Solution :

\

The fucntion f is increasing over the intervals $\"\"$ , $\"\"$ and $\"\"$ .

\

The fucntion f is decreasing over the intervals $\"\"$ and $\"\"$ .

\

\

(2) \ \

\

Step 1:

\

Observe the graph.

\

The function f is increasing for the value of x between $\"\"$ to $\"\"$ and 5 to 7.

\

Therefore the function f is increasing over the intervals $\"\"$ and $\"\"$ .

\

Observe the graph.

\

\

The function f is decreasing for the value of x between $\"\"$ to $\"\"$ and $\"\"$ to 5.

\

Therefore the function f is decreasing over the intervals $\"\"$ and $\"\"$ .

\

Solution :

\

The fucntion f is increasing over the intervals $\"\"$ and $\"\"$ .

\

The fucntion f is decreasing over the intervals $\"\"$ and $\"\"$ .