contestada

which equation is the equation of the line, in point-slope form, that has a slope of -4 and passes through the point (7,1)

Answer choices:

A. y-7 = 4(x-1)

B. y-1 = -4(x+7)

C. y-1 = -4(x-7)

D. y-7 = -4(x-1)

Respuesta :

biancamilburn3

y – y1 = m(x – x1)


First, you have to find m, or the slope.


This is


y - y

-------

x - x


It doesn't matter which way you put it in, but I'm going to do it like this:


-10 - (-8)

-------------

-7 - (-6)


This reduces into:


-2/-1 = 2


Now, it'll look like this (according to your answer choices, but you can use the other coordinate, also):


y - (-10) = 2(x - (-7))


This turns into:


y + 10 = 2(x + 7)


This answer is: C.


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