19 Line a is parallel to line b. Line b passes through the points (-2, 7) and (5, 3) and line a passes through the point (-5, 1). Write an equation of line a in point-slope form.

Respuesta :

Answer:

[tex]y - 1 = - \frac{4}{7} (x + 5)[/tex]

Step-by-step explanation:

Point-slope form

y- y₁= m(x -x₁), where m is the slope and (x₁, y₁) is a coordinate the line passes through

Parallel lines have the same slope.

[tex]\boxed{slope = \frac{y1 - y2}{x1 - x2} }[/tex]

Slope of line a

= slope of line b

[tex] = \frac{7 - 3}{ - 2 - 5} [/tex]

[tex] = \frac{4}{ - 7} [/tex]

[tex] = - \frac{4}{7} [/tex]

Substituting the slope into the equation:

[tex]y - y1 = - \frac{4}{7} (x - x1)[/tex]

Substituting the coordinates (-5, 1):

[tex]y - 1 = - \frac{ 4}{7} [x -( - 5)][/tex]

[tex]y - 1 = - \frac{4}{7} (x + 5)[/tex]