Vermillion

Skeleton and word equation of the following elements in the periodic table

Suppose you bought cellphone casing and plans to sell with an additional of Php 25 per casing. You thought of maximizing the number of casings sold by decreasing the price every week by 5 pesos for one month. The number of casing sold per week are as follows :

140 casings for first week

160 casings for the second week

185 for the third week

210 for the fourth week

1) Create a table of values and draw a scatter plot of your sales for the whole month?

2)What trend can you see? Is it quadratic or linear?

3)What quantity is represented in the y-axis?

4)What quantity is represented in the x-axis?

5)Write an equation to model the date given above.

6)Give a reasonable domain and range of your model.

Here's the graph.

1)What trend can you see? Is it quadratic or linear? Why?

2)Write an equation for a model of these data. Find the vertex and use (3, 20.73) as the other point.

3)Using your equation, estimate the number of sales in 2011.

4)The actual sales in 2011 is 72.29 million units. Was your equation able to give you a good estimate?

5)Give reasonable domain and range for this model.

6)Predict Apple's sales in 2014.

7)Will apple's Iphone sales continue to increase in the next 5 years? Why?