Question

Help please 10 minutes

Answer 1

Slope Formula: (y² - y¹) / (x² - x¹)

1 + 7 = 8

-1-1 = -2

8/2 = 4

-2/2 = 1

4/1 = -4

Your answer is B.

Hope this Helps!!

Answer 2

The slope-intercept form:

$y=mx+b\\\\m=\dfrac{y_2-y_1}{x_2-x_1}$

We have (1, -7) and (-1, 1).

Substitute:

$m=\dfrac{1-(-7)}{-1-1}=\dfrac{8}{2}=4$

Therefore we have

$y=4x+b$

Substitute the coordinates of the first point to the equation of line:

$-7=-4(1)+b$

Answer:

$\dfrac{1+7}{-1-1}=-4;\ -7=-4(1)+b$