A real world problem involving a proportional relationship, explain how you know the relationship is proportional.

Proportional

either directly proprtional or inversely

directly means x/y=k where k stays the same

therefor if x goes up then y goes upp, if x decreases, then y decreases

inversely=xy=k

when x goes up y goes down, if x decreases then y increases

one example for each

directly would be rate

machine makes 450 toys in 4 hour

how many toys mad in 7 hours

we know that when hours goe up, then toys go up so it's poropetional

inverssely

bob needs to earn 100 dollars per day

his pay rate changes so he works differen hours each day

so

x=number of hours

y=pay

xy=pay