It is increase, because 15 is less than 18. Other way around, if the question is 18 to 15 yards, then that would be decrease, because it is getting smaller.
7. D
8. D
9. D
10.C
for 7 & 8 you use the equation

your points are (3,8) & (9,5)
so you plug the numbers in
y2= 5
y1=8
x2=9
x1=3
you subtract them get a fraction and that is your slope
9 & 10
use the equation

plug you numbers in for y1 and x2 m is your slope plug it in and that is your equation
Step-by-step explanation:
If y was directly proportional to x, the graph of y against x would pass through the origin (O).
Since the graph above does not show this, y is not directly proportional to x.
5. NO SOLUTIONS
6. INFINITE MANY
I'm really sorry if the pic is kinda confusing lol
the cut part is "subtract 3x both sides of the equation"
Answer:
- 4/22t - 5/22t =
- 4 - 5 = -9
- 9/22t is the answer
it is basically subtracting the numerators because the denominators are the same.