2. Let f(x) = mx +1x +k. The value -5, which is f(3), is the minimum value of the function. One of the zeros is-2. Find the y-intercept of the graph of f. 3. (Multiple choice). "During 1988, Nicaragua's inflation rate averaged 1.3% a day." Which formula represents the above statement? Assume t is measured in days. Explain. (a) I= 1e 0.013( (b) I = 1,(1.013) (c) 1 = 1,(1.013) (d) 1 = 1,(1.3) 4. For what values of m and n is f(g(x)) = g(f(x)) if f(x) = x + n and g(x) = mx + b? 5. Given a quadratic function f(x) = ax+bx+c, a 0. a) How do you find the horizontal and vertical intercepts, if any? b) The graph of f is called a How do you find the vertex? c) What is the relationship between the x-intercepts and the x-coordinate of the vertex?