Math 15 Module 4 - Activity 4 - Gayta
Math 15 Module 4 - Activity 4 - Gayta
Math 15 Module 4 - Activity 4 - Gayta
1. The following table shows the number of items sold for two popular brands (A & B)
of cell phones at a shop in 10 days.
Day 1 2 3 4 5 6 7 8 9 10
Brand 63 55 69 58 66 64 80 76 71 60
A
Brand 140 126 150 134 145 141 178 172 159 132
B
a. Compute for the slope (m) and the ordinate of the y intercept (b)
b. State the regression equation.
c. Estimate the number of brand B cell phones that can be sold if there are 70 brand A
cell phones sold in a particular day.
2. The enrollees for BSED-Math in a private college for 12 years since 2007 and the
corresponding collected student dues ( pesos) yearly is shown in the table.
Year
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
No. of 63 54 69 58 65 64 80 76 71 60 77 83
Enrollees
Collected 10,800
12,500
20,100
15,000
18,400
17,900
25,500
24,000
25,000
22,300
26,000
28,000
dues
a. Compute for the slope (m) and the ordinate of the y intercept (b)
b. Write the regression equation.
c. Predict the amount of dues that will be collected if there will be 100 enrollees.