Answer:
Step-by-step explanation:
The the age of Sarah be x and the amount she has be y:
When Sarah was 5 and her amount is $50
When x1 = 5, y1 = $50
Also when Sarah was 6, her amount is $100
When x2 = 6, y2 = $100
Find the slope which is also the constant of proportionality
x= ky
k = y2-y1/x2-x1
k = 100-50/6-5
k = 50/1
k = 50
Substitute the value of k in the formula:
x = 50y
This means that Sarah's age is directly proportional to the amount she have. Hence, it can be concluded that it is a direct relationship
