Answer:
Yes, the total price is proportional to the pounds of oranges she purchased.
Explanation:
The price of oranges is $0.78 per pound.
So, the price $0.78 corresponds to one pound, in a way, that is called direct proportionality.
This means that the price will increase or decrease in a constant ratio, depending on the amount of pounds purchased.
For example:
If she buys 1 pound of oranges she will pay $0.78. Ratio is 0.78 (0.78/1)
If she buys 2 pounds of oranges she will pay $1.56. Ratio is 0.78 (1.56/2)
If she buys 2.5 pounds of oranges she will pay $1.95. Ratio is 0.78 (1.95/2.5)
If she buys 3 pounds of oranges she will pay $2.34. Ratio is 0.78(2.34/3)
We can see that ratio is constant, then we can say that the total price she pays is proportional to the pounds of oranged purchased.