Pls help! WILL GIVE BRAINLIST!

Mathematics

1 answer:

Bumek [7]2 years ago

7 0

Answer: D. y = x^2

Step-by-step explanation:

Linear functions are functions in which the power of the unknown variable is 1 , that is the other of the unknown variable will be 1

A. y = x

This is a linear function because both x and y has 1 has their power

B. y = 2x

This is also linear

C. y = x + 2

This is also linear

D. y = x^2

This is not linear , although the power of y is 1 but the power of x is 2 , for it to be linear , the highest power of the unknown must be 1

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I'm really stuck on this math problem. I never learned this in school. Can someone please help me out? Thank you

romanna [79]

Hehe, these are fun to do. There are two ways to do this kind of problem. You can use the pythagorean theorem or we can use the distance formula.
Distance formula:
$d= \sqrt{(x2-x1)^2+(y2-y1)^2}$

Pythagorean Theorem:
$a^2+b^2=c^2$

Distance formula is better if you're finding distance between two coordinates. The Pythagorean Theorem only really works for independent values. If I had 2 sides of a triangle, and I needed to find the third, I'd use this equation to find it. In this case, we'll use the distance formula.

I'll work the first one out for you:
x1 y1 x2 y2
(3, 2) & (7, 4)

$d= \sqrt{(7-3)^2+(4-2)^2}$
v
$d= \sqrt{(4)^2+(2)^2}$
v
$d= \sqrt{(16+4}$
v
$d= \sqrt{20}$

There's your answer!


I spent a lot of time making this answer to help you. Please rate it Brainliest!

7 0

2 years ago

Y is directly related to X, and Yis 81 when X is 27. The constant of variation is

Arisa [49]

Answer:

Step-by-step explanation:

A direct variation is of the form

y = kx

We know x and y so we can find k

81 = k *27

Divide each side by 27

81/27 = 27k/27