Tim Gan Math
Sign up free

Constructing and reading a quadratic graph

Constructing and reading a quadratic graph

Secondary 2
10 marks
TGM Original Questions

Optional extension

For \(y=8+2x-x^2\):

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

For graph readings, give values to the nearest 0.1 unit where an exact value cannot be read from the grid. Use the labelled axes and grid provided.

Solution:

Solution locked

680+ questions here come with free worked solutions. A free account saves your questions and progress; this one needs a course plan.

Create free accountSign inGet the E Math course · from S$29.98/moE Math tuition

Create a free account to practise similar questions.

Create free accountSign inGet the E Math course · from S$29.98/moE Math tuition
Answer:(a) \(m=5\) (c)(i) \(x\approx-2.2,4.2\) (ii) \(x=-2,4\) (d) \(x=1\). (b) See the completed graph.

Need help? Join our E-Maths tuition for O-Level success.

Learn more