The marriage rate per 1000 woman for the years 1985-2014 can be modeled by the function 132x + 1000y =9750, where x is the number of years after 1981. If the model remains accurate beyond 2014, during what year will the marriage rate FIRST reach 4.92 A) 2050 B) 2021 C) 2015 D) 2017 E) 2023

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Rate of Change

The relation between two quantities which displays how much greater one quantity is than another is called ratio.

Slope

The change in the vertical distances is known as the rise and the change in the horizontal distances is known as the run. So, the rise divided by run is nothing but a slope value. It is calculated with simple algebraic equations as: