I need help with these questions.

The graph of a quadratic function is plotted below. Use clearly identifiable value to find a possible formula for the function. 10 5- -10 -5 10 10 1 =The graph of a quadratic function is given below. 0 X (a) If the function is expressed in standard form y = ar + box + c, are the values a and c positive, negative, or zero? The coefficient a is.. positive. O negative. O zero. The constant c is..- positive. O negative. O zero. (b) If the function is expressed in vertex form y = a(x - A) + k, are the values A and & positive, negative, or zero? The constant h is... zero. O negative. positive. The constant k is... negative. O positive. O zero. (c) Can the function be factored in the form y = a (x - r) (x - s) ? Yes O No