3(13-2a)=-3+a
39-6a=-3+a
42=7a
a=6
Area of bottom rectangle:-
Area of rectangle above it:-
Area of rectangle above it
Area of triangle:-
Total:-
For a relation to be called a function, it must pas the vertical line test and each x-value must have a unique y-value
<span>The graph of this sequence would pass the vertical line test.
</span>Each day corresponds to a unique amount of pennies in this sequence.