Answer:

Step-by-step explanation:
Given
The attached graph
Required
Determine the range of the graph
First, we list out the coordinate of each point on the graph:
The points are:

A function has the form: (x,y)
Where
y = range:
From the coordinate points above,

Order from least to greatest"

Hence, the range are: 
Answer:
9:17
Step-by-step explanation:
18 + 16 = total # of students = 34
18:34
9:17
Hope this helps!
I don’t speak Spanish but if you put the English trans in the comments I’d love to answer