本题目来源于试卷: Quadratics，类别为 IB数学
[问答题]
Let $f(x)=x^{2}-4 x+3$ , for x $\in \mathbb{R}$ .
1. For the graph of y=f(x) , find:
1. the y -intercept;
2. the x -intercepts.
2. The function f can be expressed in the form $f(x)=(x-h)^{2}+k$ . Find the value of h and the value of k .
3. Sketch the graph of y=f(x) on the grid below. Clearly label the intercepts with the axes, and the vertex.
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