A quadratic function f is given. f(x) = - 4x (a) Express f in standard form. f(x) = (b) Find the vertex and x- and y-intercepts of f. (If an answer does not exist, enter DNE.) vertex (х, у) 3D x-intercepts (х, у) 3D (smaller x-value) (x, y) = (larger x-value) y-intercept (х, у) 3D (c) Sketch a graph of f. 10 Graph Layers After you add an object to the graph you can use Graph Layers to view and edit its properties. 6 4 -109-8-7-6-5-4-3-2-1| 1 2 3 4 5 6 7 8 9 10 -2 -3 No Solution -5 -6 -8 -9 -10 o Held Fill WebAssign. Graphing Tool (d) Find the domain and range of f. (Enter your answers using interval notation.) domain range