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3 years ago

A scatter plot was constructed and a line of best fit drawn as shown.

Mathematics

2 answers:

levacccp [35]3 years ago

7 0

Answer

y = 5x +25

Explanation

To get the equation of a line, first get the slope of the line.

Slope = (change in y)/(change in x)

= (60-30)/(7-1)

= 30/6

= 5

Now use one point in the line (4,45) and a general point (x,y).

Slope = (change in y)/(change in x)

5 = (y - 45)/(x - 4)

5(x - 4) = (y - 45)

5x - 20 = y - 45

y = 5x -20 + 45

y = 5x + 25

MissTica3 years ago

4 0

Answer:

y = 5x +25

Step-by-step explanation:

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Bill and susan have ages that are consecutive odd integers.The product of their ages 438.Which equation could be used to find bi

zhuklara [117]

Answer:

4 $x^{2}$ + 8 x - 435=0

Step-by-step explanation:

Let x be any natural number

Let the age of Bill= 2 x+ 1 years (Since age is odd integer)

Than, age of a Susan= 2 x + 3 years

Since ages are consecutive odd integers

According to question

(2 x+1)(2 x+ 3)= 438

4 $x^{2}$ + 8 x + 3 = 438

4 $x^{2}$ + 8 x + 3 - 438 =0

4 $x^{2}$ + 8 x - 435=0

This equation can be used to find the ages of both

Hence, the correct answer is 4 $x^{2}$ + 8 x - 435=0

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3 years ago

Lin uses an app to graph the charge on her phone.

exis [7]

Answer:

See below

Step-by-step explanation:

Use the graph to answer the following questions:

When did she start using her phone?

At 2 afternoon

When did she start charging her phone?

At 8 afternoon

While she was using her phone, at what rate was Lin’s phone battery dying?

From 100% to 40% between 2PM and 4 PM:

(100 - 40)/(4 - 2) = 60/2 = 30% per hour

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2 years ago

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valentinak56 [21]

Answer:

2.5x + 5y = 12.5

Step-by-step explanation:

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3 years ago

Using only words solve 8x+3=27 step by step

erik [133]

Answer:

X=3

Step-by-step explanation:

Subtract 3 from both sides

Simplify 27-3 to 24

Divide both sides by 8

Simplify 24/8 to 3

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3 years ago

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Jennifer wants to take a trip around the world. She plans to deposit $125 at the beginning of each month into an investment with

andre [41]

The formula of the future value of annuity due is
A=p [(1+r/k)^(kn)-1)/(r/k)]×(1+r/k)
A future value of annuity due
P payment 125
R interest rate 0.0375
K compounded monthly 12
N time 8 years
Solve for A
A=125×(((1+0.0375÷12)^(12
×8)−1)÷(0.0375÷12))×(1
+0.0375÷12)
=14,012.75

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3 years ago

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