SOLUTION: A research market company finds that at a price of p=20,they would sell x=42 tiles each month, if they lower the price to p=10, then more people would purchase the tile, and they c

Question 548282: A research market company finds that at a price of p=20,they would sell x=42 tiles each month, if they lower the price to p=10, then more people would purchase the tile, and they can expect to sell x=52 tiles in a month`s time I need the equation of the line for the demand equation and then a answer using the form p=mx+b . I have to write an equation using two points in the form (x,p)
Question 2 In 002 Walmart sales amounted to $58,200,000,00. In 2006 its sales were $90,800.000,000 I need to write the scientific notation of 2002-2006 sales. also what was the percentage growth of Walmart sales from 2002-2006 all work has to be in scientific notation
Answer by KMST(5328) (Show Source): You can put this solution on YOUR website!
QUESTION 1
Since they ask you to write the price to sales volume in the form , they assume that the relationship between sales volume and price is or can be approximated by a linear function, because that equation represents a straight line.
You have the points (42,20) for the higher price and (52,10) for the lower price.
There are many ways to get to the equation they want, but the answer will be the same.
You could calculate slope from the coordinates of the two points:

Then, you could use the coordinates of one point, along with the slope, to write the equation is slope intercept form, and the transform it into the slope-intercept form required by the problem. Alternately, you could substitute the slope found to write
, and then substitute the coordinates of one of your points, and solve for b, like this
---> --->
You get as your answer either way.
QUESTION 2
Scientific notation requires that you express the value as a number no less than 1, but less than 10, multiplied by a power of ten.
So, 58,200,000,000=5.82X10,000,000,000=
and 90,800,000,000=9.08X10,000,000,000=
You choose the number that will be multiplied by the power of ten first. The you can divide the original number by the number that will be multiplied by the power of ten, and express the result as a power of ten.
MORE EXAMPLES OF SCIENTIFIC NOTATION
( would also have the same value but does not qualify as scientific notation, because 0.99 is less than 1).
.

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