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Arada [10]
3 years ago
12

A battery with

Mathematics
2 answers:
drek231 [11]3 years ago
7 0

Answer:

Given,

The original percentage of battery = 20 %,

Also, Every minute that passes, an additional  5%,

So, the increment in percentage after x minutes = 5x percentage

Thus, the final battery after x minutes = ( 20 + 5x ) %

Let y represents the total percentage of battery after x minutes,

⇒ y = 20 + 5x

Which is the required function that shows the given situation.

For graphing,

y = 20 + 5x is a line having x-intercept = (-4,0)

And, y-intercept = (0,20)

Also, battery's capacity and time can not be negative,

⇒ x ≥ 0 , y ≥ 0

horrorfan [7]3 years ago
5 0
Y = 5x + 20

Start at (0, 20).
Then plot a point at (1, 25).

The line should be going through points (2, 30), (3, 35), (4, 40), (5, 45), etc.

For every time the x number goes up, the y number goes up 5 times for the 5%.
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Step-by-step explanation:

We want to write the equation of the line that passes through the points (7, -4) and (-1, 3) first in point-slope form and then in slope-intercept form.

1)

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2)

Now, let's use the point-slope form:

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We will substitute -7/8 for our slope m. We will also use the point (7, -4) and this will be our (x₁, y₁). So, substituting these values yield:

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Subtract. So, our slope-intercept equation is:

y=-\frac{7}{8}x+\frac{17}{8}

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