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vladimir2022 [97]
2 years ago
6

Can someone please help me

Mathematics
1 answer:
vova2212 [387]2 years ago
4 0

Answer: A

Step-by-step explanation:

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I WILL GIVE BRAINLIEST TO WHOEVER ANSWERS ALL 5 QUESTIONS AND I WILL ALSO GIVE 11 POINTS. PLEASE HELP ME I NEED IT SO MUCH.
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Automobile racing, high-performance driving schools, and driver education programs run by automobile clubs continue to grow in p
yuradex [85]

Answer:

Step-by-step explanation:

Hello!

Given the variables

X₁: Weight of a safety helmet for racers

X₂: Price of a safety helmet for racers

Note, there is n= 17 observed values for each variable so for all calculations I'll use this number and disregard the 18 mentioned in the text.

a) Scatterplot in attachment.

b) If you look at the diagram it seems that there is a negative linear regression between the price and the weight of the helmets, meaning, the higher the helmet weights, the less it costs.

c) The estimated regression equation is ^Yi= a + bXi

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b= \frac{sumXY-\frac{(sumX)(sumY)}{n} }{sumX^2-\frac{(sumX)^2}{n} } = \frac{367536-\frac{1008*6466}{17} }{60294-\frac{(1008)^2}{17} } = -30.18

a= Y[bar]- bX[bar]= 380.35-(-30.18)*59.29= 2169.77

The estimated regression equation for the price of the helmets as a function of their weight is:

^Yi= 2169.77 -30.18Xi

I hope it helps!

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lbvjy [14]

Answer:

5x-y=-17

Step-by-step explanation:

that is the answer

7 0
3 years ago
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