Write an equation in slope-intercept
form to represent the line parallel to
3x - y = 5 passing through the point
(-1,-2).

Respuesta :

For this case we have that, by definition, the equation of a line in the slope-intersection form is given by:

[tex]y = mx + b[/tex]

Where:

m: It's the slope

b: It is the cut-off point with the y axis

On the other hand, we have that if two lines are parallel then their slopes are equal.

We have the following equation of the line:

[tex]3x-y = 5[/tex]

Rewriting we have:

[tex]y = 3x-5[/tex]

Thus, the slope of the lines is [tex]m_ {1} = 3[/tex]

Then, a parallel line will have slope [tex]m_ {2} = 3[/tex]

Thus, the equation of the new line will be given by:

[tex]y = 3x + b[/tex]

To find the cut-off point "b", we substitute the point through which the line passes:

[tex]-2 = 3 (-1) + b\\-2 = -3 + b\\-2 + 3 = b\\b = 1[/tex]

Finally the equation is:

[tex]y = 3x + 1[/tex]

ANswer:

[tex]y = 3x + 1[/tex]

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