7. Which set of coordinates describe a function? A {(2, 4), (2, 2), (6, 2), (2,8)
B {(7, 2), (3, 9), (3, 10), (-1, 7)}
c {(7, - 4), (3, -3), (2, -2), (7,-8)}
D {(6, 3), (-6, 4), (4,0), (1, 2)}

Step-by-step explanation:

The last one D

As a function has a unique domain or unique element hence the option D is a function and its a one one function why? Because a one one function has unique image or range...

the ratio of white tiles to blue tiles is 48: 16. the ratio in it's simplest form is 3: 1.

step-by-step explanation:

ratio: take the first number and add a colon next to it, then add the second number after that. make sure the ratio order matches up with the written problem!

simplest form: we can simplify the ratio 48 : 16 by dividing both terms by the greatest common factor (gcf).

the gcf of 48 and 16 is 16.

divide both terms by 16:

48 ÷ 16 = 3

16 ÷ 16 = 1

reducing to simplest form:

48 : 16 = 3 : 1

i believe it is c.y = 9x

rise over run. 9 units up over 1 unit right or 9/1