Answer:
The table in the exercise can be completed with the next results:
- x          y
- 
2         <u>9</u>
- 
4         <u>11</u>
- 
6         <u>13</u>
- 
8         <u>15</u>
Step-by-step explanation:
As in the exercise Janice is 7 years older than Tam, to obtain the result in the table, you must add 7 to each age in the column x, with this we can make the next formula:
Remember that x is Tam's age, and y is Janice's age, so, you must replace the x variable in each case to obtain the result to y:
When x is 2:
When x is 4:
When x is 6:
When x is 8:
At last, <u>to obtain the graph you can use the formula made: y = x + 7</u>, and you'll obtain a graph like the attached picture, <em>where each time x obtain a unit, the y variable obtain a unit too maintaining the diference of 7</em>.
 
        
             
        
        
        
160/32= 5
5*5= 25 mm
25 mm <em>is how many millimeters represents the kilometers.
</em>
I hope this helps!
~kaikers
        
             
        
        
        
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.

 
        
             
        
        
        
So you would use GEMDAS or PEMDAS 
-8-1+4x2
-8-1+8
-9+8
  -1