Respuesta :

Explanation

We have the following information:

[tex](-2,5);y=-4x+2,[/tex]

and our task is to find the slope-intercept equation of the line that passes through the given point and is parallel to the graph of the given line.

Recall that the slope-intercept equation of any line has the following "framework":

[tex]y^{\prime}=m\cdot x^{\prime}+b,_{}[/tex]

where "m" and "b" are constants called the slope of the line and the y-intercept, respectively. We want our line to be parallel to the graph of the given one; this means that the slope of both lines must be the same. Then,

[tex]m=-4.[/tex]

Then, our equation becomes

[tex]y^{\prime}=-4x^{\prime}+b\text{.}[/tex]

Now, we want the point (-2,5) to lie on the line. In other words, this point must "satisfy" our equation in the following sense:

[tex]5=-4(-2)+b\text{.}[/tex]

Solving this equation for b, we get

[tex]\begin{gathered} 5=-4(-2)+b, \\ 5=8+b, \\ 8+b=5, \\ -8+(8+b)=-8+5, \\ -8+8+b=-3, \\ b=-3. \end{gathered}[/tex]

Then, our desired equation is

[tex]y^{\prime}=-4x^{\prime}-3.[/tex]

Graphically, all looks like

(The green line represents the given one, and the blue line represents the requested line. And clearly, the orange point is the given point)

Answer

The slope-intercept equation of the line that passes through the given point and is parallel to the graph of the given line is

[tex]y^{\prime}=-4x^{\prime}-3.[/tex]

Ver imagen JabrielH586069