Answer:
8.) Not a function
9.) Is a function
Step-by-step explanation:
In order for a set of coordinates to be a function, the y cannot be repeated.
In number 8, there is (3,1) and (9,1)
<em>Not a function</em>
In number 9, each coordinate is unique and doesn't repeat the y.
<em>Is a function</em>
t = d/S
S = d/t
Cross multiply
S x t = d
Divide both sides by S
S/S x t = d/S
A'∪B has no elements in it
x ≈ 54.8°
Using the tangent ratio in the right triangle
tan x = = = , then
x = ( ) ≈ 54.8° ( to the nearest tenth )