Answer:
y=-7x-9
Step-by-step explanation:
y=mx+b(where m is slope and b is y intercept)
y=-7x+b
plugging the number in we get
12=-7(-3)+b
12=21+b
b=-9
so y= -7x-9
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The equation of the line should be y=-7x-9
We know that
y = mx + b
Here
m should be slope
And, b should be y-intercept
Since there is the slope of −7 that passes through the point (−3,12)
So, the equation could be
y=-7x+b
Now
12=-7(-3)+b
12=21+b
b=-9
Therefore, The equation of the line should be y=-7x-9
Learn more about an equation here: https://brainly.com/question/15179946
