(a)

The function is .

Compare the equation with is a line passing through origin.

So the function is a line.

From the graph, it matches with graph is a line passing through origin.

(b)

The function is .

Compare the equation with is a exponential function.

Where is a positive constant.

So the function is a exponential function.

From the graph, it matches with graph is a exponential function.

(c)

The function is .

Compare the equation with is a power function.

Where is a positive integer.

Here so the function is a power function.

It is also a polynomial function of degree 3.

From the graph, it matches with graph is a power function.

(d)

The function is .

Compare the equation with is a root function.

Where is a positive integer.

Here so the function is a cube root function.

From the graph, it matches with graph is a root function.

(a) .

(b) .

(c) .

(d) .