SOLUTION: The first known use of the word "podcast" occurred in the US in 2004. By 2007, 27% of IS consumers were aware of podcasting and by 2015 that number had grown to 49%. Write a linear

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: The first known use of the word "podcast" occurred in the US in 2004. By 2007, 27% of IS consumers were aware of podcasting and by 2015 that number had grown to 49%. Write a linear      Log On


   

Question 1119844: The first known use of the word "podcast" occurred in the US in 2004. By 2007, 27% of IS consumers were aware of podcasting and by 2015 that number had grown to 49%. Write a linear equation in slope-intercept form that models this growth. Let x stand for the number of years after 2007 and let y stand for the percentage of US consumers aware of podcasting.


Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
2004, 0 known
2007, 27%
2015, 49%
This becomes (0, 27) and (8, 49)
point-slope formula y-y1=m(x-x1) m slope (x1, y1) a point. Slope is 22/8 or 11/4
y-27=(11/4)x
y=2.75x+27 ANSWER
in 2007, x=0 and y=27
in 2015, x=8 and y=49