3) A linear equation to represent this would be 205 = 10x + b x is days passed, which is 10, and b is the original amount. 10 times 10 is 100, so we now have 205 = 100 + b Subtract 100 from both sides to get 105 = b, which is the starting amount. The rate of change is 10, however many cans brought per day. 4) So it appears that for every 5 minutes she frosts 4 cupcakes, which means the rate of change is 4/5 using rise over run. Subtract 4 from 28 to get the starting amount 5 minutes earlier. The starting amount of frosted cupcakes is 24. 5) Every 3 months he gets 9 more CDS. So, every month he gets 3 new CDs. That means the slope is 3. Subtract 9 from 18 to get the starting amount. The starting amount of CDs is 9.
