constant of proportionality, scale, scale drawing
TEKS 7(1)(A), 7(1)(G), 7(5)(C)
A scale drawing is an enlarged or reduced drawing of an object that is proportional to the actual object.
A scale is the ratio that compares a length in a scale drawing to the corresponding length in the actual object.
A 1 in.-long scale drawing is made of a 15 ft boat. The scale can be written as:
TEKS 7(1)(A), 7(5)(C)
You can use a scale to find an actual distance given a scale drawing. You can also use a scale to make a scale drawing given an actual distance.
Consider the scale 1 in. = 15 ft. You can write two different ratios.