What you have so far is correct.
Problem 7 is a function because none of the x values repeat. Each x input goes to exactly one y output. The y values can repeat. If the y values repeat, then we don't have a one-to-one function.
In contrast, problem 8 is not a function. We have x = 1 go to y = 8 and y = 6 at the same time. This is one example showing we don't have one output for a given input.
Answer:
(a) 55.6%
(b) 45.0%
(c) 38.5%
(d) 27.1%
(e) 64
(f) 47
(g) The Lions
Step-by-step explanation:
(a) Free throw % for Lions is

(b) Free throw % for Eagles is

(c) For the Lions, they attempted a total of 51 + 14 = 65 field goals and made 21 + 4 = 25.
Field goal % for Lions is

(d) For the Eagles, they attempted a total of 45 + 14 = 59 field goals and made 10 + 6 = 16.
Field goal % for Eagles is

(e) Total points by Lions = (10 × 1) + (21 × 2) + (4 × 3) = 10 + 42 + 12 = 64
(f) Total points by Eagles = (9 × 1) + (10 × 2) + (6 × 3) = 9 + 20 + 18 = 47
(g) The Lions won because they had more points.
They have the same slope. All three lines are parallel. Any parallel lines have equal slopes.
Answer:
7
Step-by-step explanation:
form a proportion
12/2=42/x
cross multiply
12x=84
x=7