Which equation represents a line that passes through (–2, 4) and has a slope of ?

y – 4 = (x + 2)
y + 4 = (x – 2)
y + 2 = (x – 4)
y – 2 = (x +4)

Respuesta :

slope = 1

equation
y - y1 = m(x - x =1)
a line that passes through (–2, 4)
so equation should be

y - 4 = 1(x +2)
or
y - 4 = (x + 2)

answer is first one.

y – 4 = (x + 2)

y – 4 = (x + 2)

Further explanation

We will determine the line equation. Later the equation will be arranged in slope-intercept, point-slope, and standard form.

Given:

  • A line that passes through (–2, 4).
  • A slope of 1.  

The Process:

  • Slope or gradient m = 2.
  • Point (x₁, y₁) is (-2, 4).  

Part-1

[tex]\boxed{ \ Slope-intercept \ form: y = mx + c \ }[/tex]

Substitution.

[tex]\boxed{ \ \ m = 1 \rightarrow y = x + c \ }[/tex]

The line passing through the point (-2, 4).

[tex]\boxed{ \ x_1 = -2, y_1 = 4 \ } \rightarrow \boxed{ \ 4 = (-2) + c \ } \rightarrow \boxed{ \ c = 6 \ }[/tex]

Thus the slope-intercept form is [tex]\boxed{\boxed{ \ y = x + 6 \ }}[/tex]

Part-2

[tex]\boxed{ \ Point-slope \ form: y - y_1 = m(x - x_1) \ }[/tex]

[tex] \boxed{ \ m = 1 \rightarrow y - y_1 = (x - x_1) \ } [/tex]

The line passing through the point (-2, 4).

[tex] \boxed{ \ x_1 = -2, y_1 = 4 \ } \rightarrow \boxed{ \ y - 4 = (x - (-2)) \ } [/tex]

Thus the point-slope form is [tex]\boxed{\boxed{ \ y - 4 = (x + 2) \ }}[/tex]

Part-3

[tex]\boxed{ \ Standard \ form: ax + by = k \ }[/tex]

From the results of Part-1, we set the position of the variables.

[tex]\boxed{ \ y = x + 6 \ }[/tex]

[tex]\boxed{ \ x + 6 = y \ }[/tex]

[tex]\boxed{ \ x - y = - 6 \ }[/tex]

Thus the standard form is [tex]\boxed{\boxed{ \ x - y = - 6 \ }} \ or \ \boxed{\boxed{ \ y - x = 6 \ }} \ or \ \boxed{\boxed{ \ x - y + 6 = 0 \ }}[/tex]

Learn more

  1. Find out ordered pairs could be points on a line that is perpendicular to another line  https://brainly.com/question/2601054  
  2. Determine the line equation, in slope-intercept form, that is parallel to the given line and passes through a point  https://brainly.com/question/1473992  
  3. Determine an equation represents Nolan’s line https://brainly.com/question/2657284

Keywords: the line equation, slope-intercept form, standard form, point-slope, gradien, a line that passes through (–2, 4)

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