So, is this is the right way to do this question?

Step-by-step explanation:

A parallelogram is a two-dimensional geometric structure that always has four sides, of which opposite sides are the same length, and parallel.

On the contrary, a parallelogram is a slanting rectangle with two sets of parallel opposite sides. The basic difference between rhombus and parallelogram lies in their properties, i.e. all the sides of a rhombus have the same length, whereas parallelogram is a rectilinear figure whose opposite sides are parallel.  For me this a bit complicating.

Hope this helps

Step-by-step explanation:

a parallelogram is a four sided plane rectilinear figure with opposite sides parallel.

a.)the line for function b is steeper