Answer:
12
Step-by-step explanation:
Here is what the graph looks like
Answer:
The original price was $30
Step-by-step explanation:
The coordinates of points in the graph are,

and

Any other point whose first coordinate(the x-co-ordinate) coincides with one of these points will make the relation not a function.
The relation becomes one- to-many relation which is not a function.
It will also fail the vertical line test , if the points are connected with line segments.
One of such point is,
1 and one fourths( 1 1/4)