SOLUTION: in regression line y=a+bx,y denominates the telephone bill amount and x denominates the units consumed.when 200 unit were consumed the Bill amount was Tsh 2500000 And when 500 uni

Question 1174630: in regression line y=a+bx,y denominates the telephone bill amount and x denominates the units consumed.when 200 unit were consumed the Bill amount was Tsh 2500000 And when 500 unit were consumed the bill amount was tsh 4900000 find a and b
Answer by MathLover1(20855) (Show Source): You can put this solution on YOUR website!

denominates the telephone bill amount
and
denominates the units consumed
given:
when unit were consumed the Bill amount was Tsh
so we have
.............eq.1
and when unit were consumed the bill amount was tsh
so we have
.............eq.2

to find and solve system

.............eq.1
.............eq.2
--------------------------------------------------subtract eq.1 from eq.2

go to
.............eq.1, substitute

and, your equation is:

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