<em>The </em><em>Amount of Trans</em><em> shows us that we </em><u><em>subtract</em></u><em> those numbers from the balance and the </em><em>Amount of Deposit</em><em> shows us that we </em><u><em>add</em></u><em> those numbers to the balance.</em>
No it is not proportional. Since she brought the last apple for 1/2 the price, the equation won’t be linear (straight line) anymore so it won’t be proportional. Proportional means the same unit rate.
