SOLUTION: A) find linear equation to approximate CPI y in year x, with x=0 corresponding to 1993 when CPI is 144.5 in 1993 & 184.2 in 2003 b) Estimate CPI in 2007 C) What rate is CPI increas

Algebra ->  Linear-equations -> SOLUTION: A) find linear equation to approximate CPI y in year x, with x=0 corresponding to 1993 when CPI is 144.5 in 1993 & 184.2 in 2003 b) Estimate CPI in 2007 C) What rate is CPI increas      Log On


   

Question 364099: A) find linear equation to approximate CPI y in year x, with x=0 corresponding to 1993 when CPI is 144.5 in 1993 & 184.2 in 2003 b) Estimate CPI in 2007 C) What rate is CPI increasing?
factor & solve: x2-5x+6=0, 5x2+17x+6=0 & x2-7x-30=0
Thanks.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi, 

*Note: Note using y = mx + b

x=0 corresponding to 1993 when CPI is 144.5 in 1993

y = mx + 144.5

m = 39.7/10 (change in y over change in x)

y = 3.97x + 144.5

Estimate CPI in 2007   Note: 14 years have passed

y = 3.97*14 + 144.5

What rate is CPI increasing 3.97/yr beginning in 1993



x^2-5x+6=0

factoring: 

representing as a PRODUCT,in this case(x-?)(x-?)...according to signs shown

(x-3)(x-2)works as -3x + -2x = -6x and (-3)*(-2) = 6