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Ipatiy [6.2K]
2 years ago
11

Two students withheld their scores to determine the strength of the model. Using the actual line of best fit equation, predict t

heir scores based on their hours worked. Actual line of best fit: y= 4.81x + 17.4 Hours (x) | Score (y) 15 | ? 9 | ?
Mathematics
2 answers:
Sedaia [141]2 years ago
8 0

Answer:

The value of y is 89.55 at x=15 and 60.69 at x=9.

Step-by-step explanation:

The equation of best fit line is

y=4.81x+17.4

where, y is scores of two students after x working hours.

We need to find the score after 15 and 9 hours.

Substitute x=15 in the given equation.

y=4.81(15)+17.4

y=89.55

Substitute x=9 in the given equation.

y=4.81(9)+17.4

y=60.69

Therefore, the value of y is 89.55 at x=15 and 60.69 at x=9.

tiny-mole [99]2 years ago
5 0

Answer:

When x = 15, y = 89.55

When x = 9, y = 60.69

Step-by-step explanation:

We are given the following information n the question:

The actual line of best fit equation predict the scores based on the number of  hours worked by the students.

Actual line of best fit:

y= 4.81x + 17.4

where x is the number of hours worked and y is the predicted variable that is the scores.

We have to determine the score of students when they worked for 15 hours.

Thus, x = 15

Putting value in the equation:

y = 4.81x + 17.4\\y= 4.81(15) + 17.4 = 89.55

Score = 89.55

We have to determine the score of students when they worked for 9 hours.

Thus, x = 9

Putting value in the equation:

y = 4.81x + 17.4\\y= 4.81(9) + 17.4 = 60.69

Score = 60.69

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