This task gives you an opportunity to:
Relate equations, descriptions and graphs of a relationship.
On the opposite page are four graphs.
Below are four descriptions and four equations.
Choose the description and the equation that fits each graph.
Write the correct description and the correct equation under each graph.
Descriptions:
x is the width and y is the length of a rectangle with a constant perimeter.
x is the radius and y is the area of a circle.
x is the length and y is the width of a rectangle with a constant area.
x is the radius and y is the circumference of a circle
Equations:
y-
X
y-ka
y-kx²
y=k-x
In each equation, k is a fixed number
1. Explain how you made your choices.