$4.30 makeup; 40% discount; 6% tax

1 answer:

4 0

Okay, i don't want to give you the direct answer because i want you to know how to do it ... First you multuply $4.30 x .4 and you will get a number... remember that number in your head and subtract it from the original amount of $4.30... then once you get the number from subtracting the discount, multiply that number by .6..... then with that number, add the sales tax and there is your answer!

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The general equation of a regression model can be expressed thus:

y = bx + c

Slope, b = r(Sy/Sx)

Calculating slope, b :

b = 0.81(177.6 / 14.8) = 9.72

Plugging the values of b, y and x into the equation in other to calculate c :

696 = 9.72(75.8) + c

696 = 736.776 + c

c = 696 - 736.776

c = - 40.776

Therefore, the linear regression model can be expressed as : y = 9.72x - 40.776

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