Average annual notion and fees for instate students at public four-year colleges

Question

Average annual notion and fees for instate students at public four-year colleges are shown in the table for selected years and graphed as ordered pairs of points in the figure, where x = 0 represents 2009. x = 1 represent 2010. and so on. and y represents the cost in dollars. This graph of ordered pairs of data is called a scatter diagram. Find an equation that models the data using the data points (1.6695) and (3.7703). Use the equation from part (a) to predict the cost of tuition and fees at public four-year colleges in 2015.

Explanation / Answer

a) Data points are (1,6695) and (3,7703)
So, Equation of line is 7703-6695 / 3-1 = 4
m=4
and the intercept is ?
y = 4x+c
6695 = 4+c, c=6691

y=4x+6691

b) In 2015 it will be?

x=6
So, y = 6691+6(4) = 6715

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