A quadratic function is given.

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(a) The quadratic function is expressed in standard form as

f(x) = x^{2} – 4x

= (x^{2} – 4x + 4) – 4

= (x – 2)^{2} - 4

(b) Vertex: (x, y) = (2, -4)

x-intercepts: (x,y) = (0 , 0) (smaller x-value)

(x,y) = (4, 0) (larger x-value)

y-intercept: (x,y) = (0,0)

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