Answer:
(1/2), (2/4), (3/6), (4/8), (5/10) etc...
Step-by-step explanation:
0.50 is a decimal that represent a half of one...
This is already in decimal form... Do you mean fraction? If so...
(1/2), (2/4), (3/6), (4/8), (5/10) etc...
Option C:
is the slope of the line
Explanation:
The line passes through the points
and 
We need to find the slope of the line.
The slope can be determined using the formula,

Where the coordinates
and
are
and 
Let us substitute the points in the formula
Thus, we have,

Simplifying, we get,

Adding the numerator and denominator, we have,

Cancelling the negative terms, we get,

Thus, the slope of the line is 
Therefore, Option C is the correct answer.
Purple = 1/5 of the colors
5 colors per tray, 20 trays = 5 * 20 = 100 colors
1/5 * 100 = 100/5 = 20
20 colors are purple
20/100 = 1/5
1/5