Answer:
The function is linear
The function changes at a constant rate
Step-by-step explanation:
If this function were to be graphed, a line would be seen. It is not an increasing function because he is getting closer to home so the distance from his house is decreasing 
 
        
             
        
        
        
Answer: C) 5
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x = independent variable, y = dependent variable
Assuming this is a linear function, each increase of x by 2 leads to y going up by 10. So 10/2 = 5 is the unit increase each time x bumps up by 1.
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An alternative is to use the slope formula to get 
m = (y2 - y1)/(x2 - x1)
m = (25 - 15)/(4 - 2)
m = 10/2 <--- this expression shows up again
m = 5 <---- leading to the same answer as before
So we see that the slope formula is a more drawn out method to finding the answer. 
 
        
                    
             
        
        
        
Answer:
Point P = (-9,11)
Step-by-step explanation:
Point M: (1,3)               X and Y have the 2 on the bottom right of them
Midpoint N: (-5,7)
Point P: (X*2, Y*2)
( 1 + X*2          3  + Y*2 )
( _______     ________ )     =     (-5 , 7)
(      2         ,          2          )
( 1 + X*2 )
( _____ )     = -5  
(      2     )
Then multiply the left equation above by 2, and that cancels out the 2 being
divided on the bottom. Also, multiply the -5 by 2 and you get -10
1 + X*2 = -10
+1             +1
__________
X*2 =       -9     
X = -9
( 3 + Y*2 )
( ______ )       =  7
(      2       )
Then multiply the left  equation above by 2, and that cancels out the 2 being divided on the bottom. Also, multiply the 7 by 2 and you get 14
3 + Y*2 = 14
-3             -3
_________
Y*2 =       11
Y = 11
Hope this helps, good luck! :)
 
        
                    
             
        
        
        
Answer:
A
Step-by-step explanation:
because 3-8= -5 
and -2-3=-5
 
        
                    
             
        
        
        
7.25 until 8.00 = 35 minutes
8.00 until 3.00 PM =  7 hours
3.00 until 3.15 = 15 minutes
Answer is 7 hours 50 minutes