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  2. For business economics
  3. Chapter 1: Functions of one variable
  4. Power functions and polynomial functions
  5. Quadratic functions
  6. Exercise 1

Exercise 1

What is the sign of a in the quadratic function y(x)=ax2+bx+c corresponding to the graph below?

a>0
a<0
This graph does not belong to a quadratic function.
What is the sign of a in the quadratic function y(x)=ax2+bx+c corresponding to the graph below?

Antwoord 1 correct
Correct
Antwoord 2 optie
a<0
Antwoord 2 correct
Fout
Antwoord 3 optie
This graph does not belong to a quadratic function.
Antwoord 3 correct
Fout
Antwoord 1 optie
a>0
Antwoord 1 feedback
Correct: This is an upward openend parabola and hence, a>0.

Go on.
Antwoord 2 feedback
Wrong: The graph is an upward openend parabola.

See Extra explanation: graph.
Antwoord 3 feedback
Wrong: The graph does correspond to a quadratic function.

See Extra explanation: graph.