A tectonic plate in the Earth's crust moves at a constant rate of 4 centimeters per year. In a different part of the Earth, another tectonic plate moves at a constant rate of 30 centimeters in ten years. This situation Select Choice Ya proportional relationship because Select Choice
Answers
Given : A tectonic plate in the Earth's crust moves at a constant rate of 4 centimeters per year.
In a different part of the Earth, another tectonic plate moves at a constant rate of 30 centimeters in ten years.
To Find : This situation represents proportional relationship or not
Solution:
Direct variation if a variable increases then other variable also increases with a constant factor y = kx
inverse variation if a variable increases then other variable decreases with a constant factor xy = k
Joint variation is a relationship between atleast three variables,
where one variable varies directly with all other variables.
y = kxz
Combined Variation is a relationship between three or more variables where it is in direct variation with few variable
and in inverse variation with other variable y = kx/z
A tectonic plate in the Earth's crust moves at a constant rate of 4 centimeters per year.
Hence it moves in 10 years = 10 * 4 = 40 cm
In a different part of the Earth, another tectonic plate moves at a constant rate of 30 centimeters in 10 years.
40 ≠ 30 , Both are not equal hence not a proportional relationship
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