Question

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. the proportional relationships select choice equivalent because select choice

Explanation:

Step1: Find the rate of the second plate per year

The second plate moves 30 centimeters in 10 years. To find the rate per year, divide the total distance by the total number of years. So the rate $r_2=\frac{30}{10}=3$ centimeters per year.

Step2: Compare the rates

The first - plate moves at a rate $r_1 = 4$ centimeters per year and the second - plate moves at a rate $r_2=3$ centimeters per year. Since $4
eq3$, the proportional relationships are not equivalent.

Answer:

The proportional relationships are not equivalent because the rate of the first plate (4 cm/year) is not equal to the rate of the second plate (3 cm/year).