Write an equation, in point-slope form, for the line that goes through points (4,4) and (-4,-1).

A.) Y= 5/8x - 3 1/2
B.) Y= 4x + 1 1/2
C.) Y= 5/8x + 1 1/2
D.) Y= 4X - 3 1/2

Respuesta :

Answer:

C.) Y= 5/8x + 1 1/2

Step-by-step explanation:

To write the equation of a line, calculate the slope between points (4,4) and (-4,-1). After, substitute the slope and a point into the point slope form.

[tex]m = \frac{y_2-y_1}{x_2-x_1} = \frac{4--1}{4--4}= \frac{5}{8}[/tex]

Substitute m = 5/8 and the point (4,4) into the point slope form.

[tex]y - y_1 = m(x-x_1)\\y -4 = \frac{5}{8}(x-4)\\y-4 = \frac{5}{8}x - \frac{20}{8} \\\y = \frac{5}{8}x - 2{1}{2} + 4 \\ y = \frac{5}{8}x + 1\frac{1}{2}[/tex]