Question

A direct variation function contains the points (–9, –3) and (–12, –4).

a. y = –3x
b. y = –x/3
c. y =x/3
d. y = 3x

Answer 1

Answer:

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Step-by-step explanation:

First, find the slope between the two points. 

Slope = $y2 - y1 / x2 - x1$

$-4+3 / -12+9$

$-1/-3$

1/3 is the slope of this equation. 

You do not have to go any further to find b or the y-intercept because it appears that b or the y-intercept is 0 in this case. 

y= 1/3x or in other words y= x/3

Answer 2

HOLA USER

OPTION C IS CORRECT