Constructing and reading a quadratic graph

Constructing and reading a quadratic graph

Secondary 2
TGM Original Questions

For \(y=8+2x-x^2\):

  1. complete the missing table value \(m\)
  2. draw the graph for \(-3\le x\le5\)
  3. use it to estimate
    1. the values of \(x\) when \(y=-1\), and
    2. the roots
  4. state the line of symmetry.
\(x\)-\(3\)-\(2\)-\(1\)\(0\)\(1\)\(2\)\(3\)\(4\)\(5\)
\(y\)-\(7\)\(0\)\(m\)\(8\)\(9\)\(8\)\(5\)\(0\)-\(7\)

Solution:

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Answer:(a) \(m=5\); (c)(i) \(x\approx-2.16,4.16\); (ii) \(x=-2,4\); (d) \(x=1\).

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