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khhk:
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.)
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BenLindquist:
subtract
563blackghost:
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?
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