Anne has a broken ruler. It starts at the 3-inch mark and ends at the 12-inch mark. Explain how Anne could use the ruler to measure the length of a line segment in inches.
The perceived length subtracted by three would give the measure of the length of a line segment. x = perceived length f(x) = actual length Using this "broken ruler" you would need to use this simple function to get that actual length: f(x)= x-3