Learning Task 1. Tell whether each picture models a quadratic function or not. Justify your answer.
GIVEN
Answer
WHY?

The picture for this question is given below.

All of them models quadratic function.

Step-by-step explanation: A quadratic function is of the form

f(x) = ax² + bx + c, with coefficient a≠0.

This function has a U-shape graphic called parabola. It has a vertex, i.e., a point where the curve changes, which is "classified" as minimum, if the parabola opens up; and as maximum, if the parabola opens down.

The y-intercepts are the points where the curve touches the y-axis and x-intercepts, if they exist, are the roots of the function.

The three pictures below shows three U-shaped curves opening down. This means the three parabolas are representation of 3 different quadratic functions, with a 3 vertex points that are maximum.