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Semenov [28]
3 years ago
11

Describe and correct the error in writing an equation of the line.

Mathematics
1 answer:
Novosadov [1.4K]3 years ago
8 0

Answer:

the mistake they made was the wrong offset from point (0,0) into the y direction. the incline of the line was correct.

the correct equation is y = 1/2×x - 2, because this line contains both points (4,0) and (0,-2)

Step-by-step explanation:

we are looking for a line equation

y = a×x + b

the 2 points give us 2 equations to solve for the 2 variables a and b :

0 = a×4 + b

-2 = a×0 + b

=> b = -2

=> -b = a×4, => a = -b/4 = 2/4 = 1/2

so, the right equation for the line going through both points is

y = 1/2×x - 2

the difference to the original equation is simply the offset from the x- axis in the y direction.

the original equation would be parallel to the correct equation but hit the y-axis at (0,4) instead of (0,-2), and it would hit the x-axis at (-8,0) instead of (4,0)

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3 0
3 years ago
Plz explain how to do this!!!
cestrela7 [59]

Answer:

Step-by-step explanation:

You are trying to find the value of K, so to do that you need to get k by itself (example : K= 3-5 instead of K+5= 3)

So in 1a i would simplify 7k-3k= 4k

then 4k=11

now to get rid of the 4 and get the k alone- you DIVIDE 4k by 4 and divide 11 by 4 cause you need to do it on both sides of the equation, it should look like this.

4k= 11

-   =  -

4      4

(4k over 4 and 11 over four)

so the answer is k = 2.75  cause 11/4 = 2.75

8 0
3 years ago
3k - 5 = 20k what is k
Usimov [2.4K]
K is whatever you want it to be
5 0
3 years ago
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Vlad [161]
If s=2, then t= 2(2)-3 = 1
T=2(4)-3= 5
T=2(6)-3= 9
T=2(8)-3=13
6 0
2 years ago
Read 2 more answers
Please its urgent. I need workings please.
m_a_m_a [10]

Answer:

y=-2/3x-5

photo attached

8 0
3 years ago
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