Question

A limited-edition poster increases in value each year. After 1 year, the poster is worth $20.70. After 2 years, it is worth $23.81. Which equation can be used to find the value, y, after x years? (Round money values to the nearest penny.)

Answer 1

subtract

Answer 2

Your question states that `x` is `years`, so `y` is the `worth`.

You are given `1 year` with a `worth of $20.70`. So you have a point `(1,20.7)`.

You are also given `2 years` with a `worth of $23.81`. So you have a point `(2,23.81)`

You would find the slope of the two points.

\(\large\bf{\frac{y_{2}-y_{1}}{x_{2}-x_{1}} \rightarrow \color{red}{\frac{23.81-20.7}{2-1}}}\)

What is the slope?