the number of hybrid vehicles sold weekly at a local car dealership increased from 11 in 2006 to 19 in 2008. predict the the number of hybrid vehicles sold weekly in 2011.

Let us take year 2006 as reference.

(0,11),(2,19) are two points.

slope m=(19-11)/2 =4.

y-11=4t.

y=4t+11.

yera 2011 means t=5 .

y=4*5+11

=31.

number of hybrid vehicles sold weekly in 2011 =31.