Determine whether there is a minimum or maximum value to each quadratic function. Find the value and the axis of symmetry. a. f(x) = -5x+x+10 The function has a ? This value is y= b. f(x) = 4x + 4x + 15 The function has a ? This value is y= value, because a = is ? and the axis of symmetry is value, because a = and the axis of symmetry is (Enter an equation for the axis of symmetry.) is ? (Enter an equation for the axis of symmetry.)