I believe it is A and Yes
The bigger the price is on an item, the more tax you would have to pay, so both numbers increase. As for whether or not there is a line through the dots, you use a line when you could go inbetween the points. For example, with this question you can have 0.24, 0.86, or any other number as the price and it would make sense. If the question was sales tax on a certain number of shirts, well, you can't buy half a shirt so you don't need anywhere inbetween the dots.
Proportional in these kinds of problems means whether or not the line curves. If it doesn't and is a straight line, then it is proportional.
Answer:
A denominator of 15
Step-by-step explanation:
3 and 5 both go into 15, 4/5 = 12/15 and 2/3=10/15
I'm not 100% sur what it is asking but I think the expression would be
15 min. * 10 = min. till the tank is full
The function is discrete, as the fee is charged based on the hours
Answer:
30 and 47
their difference is 17 and when multiplied equal 1410