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shorty1619
24.05.2020 •
Mathematics
What is an equation of the line that passes through the point (−2,−3) and is parallel to the line 4x-y=1?
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Ответ:
y= 4x +5
Step-by-step explanation:
Let's rewrite the equation so that it is in the form of y=mx+c, where m is the gradient and c is the y-intercept.
4x-y=1
y= 4x -1
parallel lines have the same gradients. Thus the gradient of the line is 4.
y=4x+c
To find c, substitute a pair of coordinate.
When x=-2, y= -3,
-3= 4(-2) +c
-3= -8 +c
c= 8 -3
c= 5
Thus, the equation of the line is y= 4x +5.
Ответ: