2. 外语
  3. For each of the following functions, give the domain and a description of the graph y = f(x)in the xy-plane, including its shape

For each of the following functions, give the domain and a description of the graph y = f(x)in the xy-plane, including its shape

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问题 For each of the following functions, give the domain and a description of the graph y = f(x)in the xy-plane, including its shape, and the x- and y-intercepts.
(a)f(x)= -4
(b)f(x)= 100-900x
(c)f(x)= 5 -(x + 20)2
(d)f(x)=
(e)f(x)= x + ｜x｜
选项
答案Domain: the set of all real numbers. The graph is a parabola opening downward with vertex at(-20, 5), line of symmetry x = -20, y-intercept -395, and x-intercepts —20 ±[*].
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