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TiliK225 [7]
3 years ago
15

What is the equation of the following line written in general form?

Mathematics
2 answers:
DENIUS [597]3 years ago
8 0

Answer:

x-y+1=0

Step-by-step explanation:

To find the equation of the line , use the points from the graph of the line

(1,2) and (4,5)

First frame equation of the line y=mx+b

slope (m)=\frac{y_2-y_1}{x_2-x_1} =\frac{5-2}{4-1} =1

m=1, (1,2)

y=mx+b

2=1(1)+b

b=1

So equation of the line is

y=1x+1

General form is Ax+By+C=0

Subtract 1x from both sides

y=1x+1

-1x+y=1, subtract 1 from both sides

-1x+y-1=0

Divide whole equation by -1

x-y+1=0

strojnjashka [21]3 years ago
4 0
Eq. of line through (1,2) and (4,5) is
y-y1= \frac{y2-y1}{x2-x1} (x-x1),
y-2= \frac{5-2}{4-1} (x-1)y-2= \frac{3}{3} (x-1)
y-2=x-1
y-2-x+1=0
y-x-1=0
x-y+1=0
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and we do this one the same way as the other.


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Need help with this question
mixer [17]

Hey there!!

How do we find the equation of a line ?

Ans : We take the slope and the y - intercept and get them together.

How do you find slopes?

Ans - In order to find slop, we will need to use the slop formula which is

( y₂ - y₁ ) / ( x₂ - x₁ )

The two points shown in the above question are

( 4 , -8 ) and ( 8 , 5 )

y₂ = 5 , y₁ = -8 and x₂ = 8 , x₁ = 4

Now plug in the values:

( 5 + 8 ) / ( 8 - 5 )

13 / 3

Hence, the slope is 13/3

The basic formula : y = mx + b

Where b is the y-intercept and m is the slope.

We have found the slope, hence, the formula would become

... y = 13/3 x + b

Now take a coordinate and substitute it .

I will take ( 8 , 5 )

x = 8 and y = 5

Now plug in the values

... 5 = 13/3 × 5 + b

... 5 = 65/3 + b

Subtract 65/3 on both sides

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Hence, the y-intercept is -50/3

Now plug in all the values to get the total equation...

The final equation : y = 13x/3 - 50/3

... y = 13x - 50 / 3

Hope my answer helps!!

3 0
3 years ago
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