4. So the equation y÷x=k is used to find constant of proportionality, or k, so take y (sugar) and divide it by x (lemons). Look for a pattern in the answers.
1.5÷1= 0.6666667 3÷2= 0.6666667
you can see the pattern so it is proportional
5. This is similar to 4 but doing sugar to water. So look for a pattern in this one too.
7÷1.5= 4.66666667 14÷3= 4.66666667
There's a pattern in this one too so it means it's proportional
