Answer:
D.
Step-by-step explanation:
A function has to have only one y-value for every x-value. This means that D is not a function because it contains (6,2) and (6, 4), which means that there are 2 different y-values for the x-value of 6.
A = 4 in^2
The area is given by
A = l*w
A = 1in * 4 in
3
see image
okay
