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Semenov [28]
3 years ago
7

Find the equation of the line specified. The line passes through the points ( -2, 3) and ( -4, 7)

Mathematics
1 answer:
cestrela7 [59]3 years ago
7 0

Answer:

y=-2x-1

Step-by-step explanation:

Let the first coordinate point be (x_1,y_1) and the second coordinate point be (x_2,y_2)

So

x_1 = -2

y_1 = 3

x_2 = -4

y_2 = 7

Now we can use the formula for equation of line to figure it our.

Equation of line formula is  y-y_1=\frac{y_2-y_1}{x_2-x_1}(x-x_1)

Plugging in the known values and arranging in slope-intercept form, we have:

y-y_1=\frac{y_2-y_1}{x_2-x_1}(x-x_1)\\y-3=\frac{7-3}{-4-(-2)}(x-(-2))\\y-3=\frac{4}{-2}(x+2)\\y-3=-2(x+2)\\y-3=-2x-4\\y=-2x-4+3\\y=-2x-1

This is the equation of the line passing through the points ( -2, 3) and ( -4, 7)

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Determine the equation of the graph and select the correct answer below.
ElenaW [278]
Let’s substitute x values of the minimum point of the graph into each equation and see which equation gives the correct equation ;
x = -3
y = 2
1. y = (x+3)^2-2
= (-3+3) ^2 -2
= 0^2 -2
= -2
Therefore first equation is wrong

2. y = (x-3)^2 -2
= (-3-3)^2 -2
y = 36-2
y = 34
Since y isn’t 34 the second equation is wrong

3. y = (x+3)^2 +2
= (-3+3)^2 +2
= 0^2 +2
= 2
Since y =2 the third equation is correct
Therefore third equation is correct
7 0
3 years ago
Determine whether the given graph is a function or not
Alex777 [14]

Answer: yes is it a function

Step-by-step explanation:

A graph is a function when there is only one y value for each x value. You can also use the vertical line test. This example is a “quadratic function”.

7 0
3 years ago
Help me please help mee​
erastovalidia [21]

Answer:7.5

Step-by-step explanation:add all sides and then divide by 4

3 0
3 years ago
Read 2 more answers
Which ordered pair is a solution of the equation -4x + 7 = 2y - 3
Alex787 [66]

Answer:

(0,5) (1,3) (2,1)

Step-by-step explanation:

3 0
3 years ago
CAN SOMEONE HELP ME PLEASE ILL GIVE BRAINLEST..I need step to step equation thanks​
Dmitrij [34]

Answer:

The required co-ordinate is (-2, -5).

Step-by-step explanation:

For a given point, reflection of a point (x, y) across a horizontal line y = k, the reflected co-ordinates will be: $ R_{y = k} = (x, 2k - y) $.

Here, (x, y) = (-2, 7) then reflection along the line y = 1, we get:

$ R_{y = 1} (-2, 7) = (-2, 2(1) - 7) $

= (-2, -5)

The reflected point is (-2, -5).

5 0
4 years ago
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