Explain proportional values
When two quantities are producing a same ratio-value in relation to each other. In other words they have the same ratio.
Example: A rope's length and weight are in proportion. When 20m of rope weighs 1kg, then:
• 40m of that rope weighs 2kg
• 200m of that rope weighs 10kg
etc.
Another example: The lengths of these two shapes are proportional (one shape's length is always twice as large as the other)
Likewise; a line y = kx means that y has value 'k' times that of x ; the proportionality constant here is 'k' which remains same throughout.
Example: A rope's length and weight are in proportion. When 20m of rope weighs 1kg, then:
• 40m of that rope weighs 2kg
• 200m of that rope weighs 10kg
etc.
Another example: The lengths of these two shapes are proportional (one shape's length is always twice as large as the other)
Likewise; a line y = kx means that y has value 'k' times that of x ; the proportionality constant here is 'k' which remains same throughout.