[2} Find a formula for the piecewise-dened function whose graph is shown below. I [3} Find the vertex of flit} = #2 + vat + 1 by completing the square. Show your work step by step. [4} Find the value of b such that f(x] = 2$2 + to: + 'i' has vertex on the xaxis. [5} A farmer nds there is a linear relationship between the number of bean stalks, n, she plants and the yield, 3;, each plant produces When she plants 30 stalks, each plant yields 25 oz of beans. 1When she plants 33 stalks, each plant produces 30 oz of beans. Find a linear relationship in the form of y = mu +b that gives the yield when n stalks are planted. [6} A farmer wishes to enclose two pens with fencing, as shown below. If the farmer has 700 ft of fencing to work with, what dimensions will maximize the area enclosed? {Do not use derivatives. Solve this problem using Precslculus knowledge.)- CD