An infinite number! To create an equivalent fraction the numerator and denominator can be multiplied by any number; one such group of numbers that can be used to create a group of equivalent factions is the counting numbers: {1, 2,3, 4, ...} - multiply the numerator and denominator of the original fraction by 2, then 3, then 4, etc. This group is infinite in size, therefore there are an <span>infinite number of equivalent fractions that can be written for any given fraction</span>
Assuming that this is a linear relationship you must find the rate of change...$23.81-$20.70= $3.11. 3.11 is how much it changed that year. What that also gives you is how much you bought the post for at 0 years by subtracting $20.70 and the $3.11 = the price of the poster. This gives us the equation y=3.11(x)+17.59 Where Y is the value and X is the amount of years.