C. is not a function since all the F9x) numbers are identical
        
                    
             
        
        
        
Look at the picture.

The base of the ladder is 6.47 feet from the house.
 
        
        
        
Answer:
2
Step-by-step explanation:
First, you do the subtraction 120-21.4 which is 98.7. So since you know its x^7, the number isn't going to be big. By guessing and checking, we start with 2. 2^7 is 128. We know that 1^7 would just be 1, so the closest whole number would be two. 
 
        
             
        
        
        
The function will be a (linear function) linear equation in two variable and the equation of the function is y = 87x  - 783
<h3>What is a linear equation?</h3>
It is defined as the relation between two variables, if we plot the graph of the linear equation we will get a straight line.
If in the linear equation, one variable is present, then the equation is known as the linear equation in one variable.
We have given data:
Game(x):              13      14     15      16       17     18
Attendance(y):    348   435  552  609   696  783
If plot these points on a coordinate plane, we will see these points will align in a straight line.
We know we can find a line equation with two points:
(13, 348) and (14, 435)

y - 435 =87(x-14)
y = 87x  - 783
Thus, the function will be a (linear function) linear equation in two variable and the equation of the function is y = 87x  - 783
Learn more about the linear equation here:
brainly.com/question/11897796
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