This simply means that the equation of the line is a horizontal line at the appropriate y value, in this case 49.
F(X) = 49 Y = 49.
Draw a horizontal line on the y axis at the 49th number, basically, the X coordinates of all other points, would vary, but the y coordinate is the same for all of them. As the graph continues.
Domain is all real number Range is not, it would be 49 only.
If this is a trick question then it would be 8,because she would have lost the others to buy more pencils. If it is not a trick question then the answer would be 19.
Money is often defined in terms of the three functions or services that it provides. Money serves as a medium of exchange, as a store of value, and as a unit of account. Medium of exchange. Money's most important function is as a medium of exchange to facilitate transactions. -Google