Ok, here we go.  Pay attention.  The formula for the arc length is 

.  That means that to use that formula we have to find the derivative of the function and square it.  Our function is y = 4x-5, so y'=4.  Our formula now, filled in accordingly, is 

 (that 1 is supposed to be negative; not sure if it is til I post the final answer).  After the simplification we have the integral from -1 to 2 of 

.  Integrating that we have 

 from -1 to 2.  

 gives us 

.  Now we need to do the distance formula with this.  But we need 2 coordinates for that.  Our bounds are x=-1 and x=2.  We will fill those x values in to the function and solve for y.  When x = -1, y=4(-1)-5 and y = -9.  So the point is (-1, -9).  Doing the same with x = 2, y=4(2)-5 and y = 3.  So the point is (2, 3).  Use those in the distance formula accordingly: 

 which simplifies to 

.  The square root of 153 can be simplified into the square root of 9*17.  Pulling out the perfect square of 9 as a 3 leaves us with 

.  And there you go!
 
        
        
        
Direct variation is 
y=kx
subsitute
-6=-36k
diivde both sdies by -36
1/6=k
the equation is 
y=1/6x or B
        
             
        
        
        
Answer:
Its infinite solutions because its the same exact thing when you simplify the first half of the problem. 
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
WHERE IS THE TABLE
Step-by-step explanation: