Scaling & Similarity
Directly Proportional Word Problems
Constant of Proportionality is ratio between two quantities Y and X (k=y/x)
Similar Figures – Find the Missing side
The constant of proportionality and unit rate are the same thing.
If y is directly proportional to x, then the graph of y as a function of x will be a straight line. The constant of proportionality is the slope.
⃝ Find the constant of proportionality from the table
⃝ Find the constant of proportionality for each graph
⃝ Find the constant of proportionality from the equation
Proportional relationships (Review)
Two variables are proportional if a change in one is always accompanied by a change in the other.
