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Nady [450]
3 years ago
11

Charlie gathered data about the time it takes him to complete a crossword puzzle and the number of clues in the puzzle. He used

a graphing tool to organize the data in a scatter plot and find the line of best fit.
He found the relationship between the number of clues, x, and the time required to complete the puzzle, y, is modeled by the equation y = 0.376x + 15.48, and the correlation coefficient for the data is 0.219.

Could the line of best fit be used to make reliable predictions about the time it takes Charlie to complete a crossword puzzle?
Mathematics
1 answer:
SCORPION-xisa [38]3 years ago
4 0

Answer:

No, because the correlation coefficient is closer to 0 than to 1, which indicates a weak association between the variables.

Step-by-step explanation:

I got it correct

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Using this data, how many plots would be found on 6 and 1/2?
galben [10]

Answer: 6 full plots I believe

Step-by-step explanation:

4 0
3 years ago
Mary walks from comer D to comer E to comer F on a city block that measures 264 feet wide and 900 feet long. Kate walks
Y_Kistochka [10]

Answer:

Difference between the distances traveled by Mary and Kate = 226 feet

Step-by-step explanation:

By applying Pythagoras theorem in right ΔDEF,

(DE)² + (EF)² = (DF)²

By substituting DE = 264 feet and EF = 900 feet

(264)² + (900)² = (DF)²

DF = √(69696+810000)

     = √879696

     = 937.92

Distance traveled by Kate diagonally = 938 feet

Distance traveled by Mary = DE + EF

                                            = 264 + 900

                                            = 1164 feet

Difference between the distances traveled by Mary and Kate = DF - (DE + EF)

= 1164 - 937.92

= 226.07

≈ 226 feet

3 0
2 years ago
(b) A bag contains five red counters and 3 blue counters. One counter is taken at random from the bag. What is the probability o
densk [106]

Answer:

<h2>p(obtaining a red counter) = 0.625</h2>

Step-by-step explanation:

The total number of counters in the bag is 5 + 3 = 8.

and only 5 are red.

Then

the probability of obtaining a red counter is :

= \frac{5}{8} = 0.625

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