Does the value of c in the quadratic function y = ax2 + bx + c affect the vertical position of the vertex of the graph? explain why or why not.
a. no; the position of the axis of symmetry and hence the vertex point is affected only by the values of a and b.
b. yes; changing the value of c shifts the entire graph, including the vertex point, up or down.
c. no; changing the value of c shifts entire graph left or right. it does not affect the vertical position of the vertex.
d. yes; increasing c shifts the vertex point down.