Seconds because one second is less than one minute
        
             
        
        
        
Answer:
c
Step-by-step explanation:
 -7.5 is less than 6.5
 
        
             
        
        
        
If the coefficient of x^2 is negative, the graph will be n shaped and curve down instead of like a u shape if it was positive. If the vertex is below the x axis and curves down, it won’t pass the x axis, Tia is right.
        
             
        
        
        
By looking at the graph and seeing which point crosses the y axis. This point will always have an x coordinate of zero.
        
                    
             
        
        
        
Answer:
The standard deviation of the data set is  .
.
Step-by-step explanation:
The Standard Deviation is a measure of how spread out numbers are. Its symbol is σ (the greek letter sigma)
To find the standard deviation of the following data set 

we use the following formula
                                              
Step 1: Find the mean  .
.
The mean of a data set is the sum of the terms divided by the total number of terms. Using math notation we have:
                                      

Step 2: Create the below table.
Step 3: Find the sum of numbers in the last column to get.

Step 4: Calculate σ using the above formula.
