How do you find if the relationship in a table is a function

The graph of a proportional relationship passes through (9,18) and (1, y). Find y.

What is 16 percent of 65?

What is the union of the following sets? G = {12, 14, 16, 18} H = {13, 15, 17, 18}

Curtis charges a flat fee of $2.50 for each delivery plus $0.20 per mile for each mile he drives. For one delivery, Curtis drives 6 miles. How much does Curtis charge to deliver the food?

the cost of a soft drink varies directly with the number of ounces you buy if 16 oz cost $1.20 how many ounces of the soft drink could you buy for $9.60

The product of two consecutive pages is 182 find the page number

Surface area of two spheres are in the ratio 36:25 find the ratio of their volumes

Let a = {1, 2, 3, 4, 5} and b = {2, 4}. what is a ∩ b?

Phillipa says that (27 - 9) x 3: 9 + 18 = 42. Is she correct? If not, what is the correct answer? O A. She is correct. B. She is not correct. The correct answer is 2. C. She is not correct. The correct answer is 24. D. She is not correct.

2x + 3y = 1,470 Write the equation in function notation. Explain what the graph of the function represents.