Marquis wrote the linear regression equation y = 1.245 x minus 3.684 to predict the cost, y, of x songs purchased. marquis spent
$40 on songs. which is the best estimate of the number of songs that marquis purchased? 29 32 35 46
1 answer:
Answer:
35
Step-by-step explanation:
1. Write the equation
y = 1.245x - 3.684
2. Set y = 40, since that is the cost of the songs he purchased.
40 = 1.254x - 3.684
3. Add 3.684 to both sides
43.684 = 1.254x
4. Divide by 1.254
x = 35.0875502
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81.56+n-2.55=0
81.56+n=2.55
n=2.55-81.56
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X, y - the numbers
The numbers multiply to 100.
The numbers add up to -29.
Substitute -x-29 for y in the first equation:
The numbers are
-4 and
-25.
Well if the increase is 135% then
actual price=85
135% of actual price=114.75
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= actual price + increased price
= 85+114.75
=119.75
