Answer now plz i need help 1. Which is an equation in slope-intercept form of the line that contains the points (7, –9) and (8, –7)?

a. y = 2x – 23

b. x + 2y = –23

c. y = 2x + 23

d. x – 2y = 23

a. y = 2x - 23

Step-by-step explanation:

coordinates: (7, -9) & (8, -7)

y = mx+b

m (slope) = rise/ run = (y2-y1) / (x2-x1)

=( -7 - (-9) ) / (8-7)

=(-7+9) / 1

= 2/1

= 2

therefore, y=2x + b

now to find (b):

taken coordinate, (7, -9):

y= 2x + b

substitute the coordinates:

-9 = 2 (7) + b

-9 = 14 + b

-9 - 14 = b

-23 = b

(*we'll get the same value of b for the other coordinate too)

therefore, y= 2x - 23

answer is b

step-by-step explanation:

for this case we must apply distributive property to the following expression:

the distributive property states that:

then, when applying the property we have to multiply the -2 for each term within the parenthesis: