Answer:
10
Step-by-step explanation:
I hope this helps you understand the steps to get your answer...
It would be D, because to be a function, a set of ordered pairs cannot have the same x value. The y value can be the same though.
(5,6), (8,6), (9,6)
As you can see, all of the x values are different, so it is a function.
To change a fraction to a decimal, simply divide the numerator by the denominator. The numerator is the top part of the fraction, while the denominator is the bottom part of the fraction.
4 ÷ 5 = 0.8
Thus,

<span>as a decimal would be 0.8</span>