Question

Help! I'm confused!

I'm trying to get m from the equation below but I don't know if I should use that formula or the y-intercept with the x-intercept to find m. I know I'm supposed to use the y-intercept to find the point slope form...

D: Write the equation of the line that passes through the points (3, 4) and (–3, –8) in point-slope form.

Answer 1

y = mx + b

Insert points into the equation to form a system of equations, then solve for m:

4 = 3m + b
-8 = -3m + b

Answer 2

D: I only know how to do

m= y2-y1/x2-x1

Answer 3

Isolate b in each equation:

b = 4 - 3m
b = 3m - 8

set b = b:

4 - 3m = 3m -8

Place like terms on the same side, then solve for m:
8 + 4 = 6m
12 = 6m
12/6 = m
2 = m

Answer 4

oh! okay ;n; I get it now, thanks that help a lot!! :DD

Answer 5

\[\frac{y_2 - y_1}{x_2 - x_1} = \frac{4 + 8}{3 + 3} = \frac{12}{6} = 2\]

Answer 6

thaaaaaaaank you so much! :DD

Answer 7

You only get it when you're able to do these on your own without help. Until then, keep practicing.

Answer 8

c: will do~