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27.10.2020 •
Mathematics
A line has a slope of -2 and goes through the point (0, -5). What is the equation of this line, in slope-intercept form?
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Ответ:
y=-2x-5
Step-by-step explanation:
For m=-2
For (0,-5) a=0 AND b=-5
(use the equation y-b=m(x-a) to find the equation of the line)
y-b=m(x-a)
(sub the values of m (the slope) and a&b (from the point passing through the line)
y - (-5) = (-2) × ( x - 0 )
(simplify)
y+5=-2(x-0)
(expand the bracket)
y+5 = -2x+0
(subtract 5 for both sides)
y=-2x+0-5
(simplify)
y=-2x-5
Ответ:
the slope is 8
Step-by-step explanation:
Whatever number is in front of the variable "x" is the slope