kendasinjab
12.01.2020 •
Mathematics
Write an equation of the line that passes through the given points. (-1,7) (3,-9)
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Ответ:
y=-4x+3
Step-by-step explanation:
If we wanted to write an equation for the line in slope intercept form, than first we would need to find the slope. We can do this by using the equation y2-y1/x2-x1=m or slope. Slope intercept form can be written as y=mx+b.
-9-7=-16
3--1 or 3+1=4
Now we can divide.
-16/4=-4
The slope is -4
Now we have to find the y intercept, or b.
To do so, insert all of the place values we know into the equation and solve for b.
7=4+b
3=b
So the y-intercept is 3.
Finally, we can write the complete equation as y=-4x+3
Hope this helps! :D
Ответ: