Proportion

Proportion

1. ALWAYS...

   • 1. Write down the statement of proportionality and then the formula
   • 2. Substitute the values you are given
   • 3. Solve the equation to find k
   • 4. Write down the formula using the value of k
   • 5. Use your formula to find any unknown values

2. Two quantities are in DIRECT PROPORTION when both quantities increase at the same rate

3. Two quantities are in INDIRECT PROPORTION when one quality increases at the same as the other quality decreases

4. DIRECT PROPORTION graphs

   • -Straight line
   • Passes through the origin
   • K is the gradient of the line