Aboa constrictor is 18 inches long at birth and grows 8 inches per year. write an equation that represents the length yy (in feet) of a boa constrictor that is xx years old.

Before formulating the equation, let's identify first the dependent and independent variable. An independent variable is the parameter that controls the outcome of the dependent variable. Hence, the independent is time in years denoted as x, and the dependent is length denotes as y. So, the function should be written as y = f(x).

From the description, 18 inches is the original length. Let's convert this first to feet: 18 inches* 1 foot/12 inches = 1.5 feet. From there, it grows linearly by 8 inches per year, or 0.67 foot per year. So, the equation would be:

y = 1.5 + 0.67x