What is the area of figure abcd?

104 square inches
120 square inches
136 square inches
168 square inches

The area of Figure ABCD is:

                          120 square inches.

We know that the figure is the shape of a trapezoid .

and we know that the area of trapezoid is given by:

i.e. If B and B' are two bases of the trapezoid and H is the height of the trapezoid then,

Here in the figure we have:

Hence, the area of figure is:

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value