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Dana’s phone has zero battery. After charging her phone for one minute it has 2% battery. After 2 minutes her phone has 6% battery. Based on this predict the number of minutes it will takes for Dana to charge her phone battery’s so that it had 50% power and 90% power.

Respuesta :

Using the line of best-fit, it is found that:

  • 50% power is obtained after 16.8 minutes.
  • 90% power is obtained after 30.1 minutes.

How to find the equation of linear regression using a calculator?

To find the equation, we need to insert the points (x,y) in the calculator.

In this problem, the points are:

(0,0), (1,2), (2,6).

Hence, using a calculator, the estimate for the battery after x minutes is given as follows:

y = 3x - 0.333.

50% power is obtained when y = 50, hence:

50 = 3x - 0.333

x = 50.333/3

x = 16.8 minutes.

90% power is obtained when y = 90, hence:

90 = 3x - 0.333

x = 90.333/3

x = 30.1 minutes.

More can be learned about a line of best-fit at https://brainly.com/question/22992800

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