It will be the last one a×b×b
We will be using the Point Slope formula which is 
The information we are given is that m = -4 and the point is (2,-5), so we can input it into the equation.

This simplifies into 
Then we can subtract 5 from each side to get the answer:

Answer:
Total sales revenue use excel function : ( SUMIF. =sumif(range, criteria, [sum_range] )
For each of the stores: Use excel function: For Store 1: =sumif(B4:B99,1,I4:I99) then repeat same for Store 2 to store 8
Step-by-step explanation:
To modify the spreadsheet to calculate the total sales revenue we will add a column " sales revenue "
multiply values of column : ( unit sold * unit price ) to get Total sales revenue. then use excel function : ( SUMIF. =sumif(range, criteria, [sum_range] ) to find Total sales revenue
calculate the total revenue for each of the 8 stores using a pivot table using "store identification number" in row and " sales revenue " in values field
To get the sales revenue ; replace " store identification value" with sales region " column
Answer:
The simplest equation for a parabola is y = x^2
Looking at the graph closely we can see that the heart rate increases from 0 to 6 min then became steady from 6 to 25 min then finally decreases from 25 to 30 min. Therefore the correct answer is:
“The heart rate increases for 6 minutes, remains constant for 19 minutes, and then gradually decreases for 5 minutes.”
In real life cardiac exercises, we can interpret that the period from 0 to 6 min is the period where the person is still warming up thus leading to an increase in heart rate. At 6 min, the person is fully warmed up hence reaching a stable heart rate. Then at 25 min, the person starts cooling down which means that the exercise is ending soon.