What is an equation of a line, in point-slope form, that passes through (1, −7) and has a slope of −2/3?
Take this information and plug it into the point-slope formula:
y - y1 = m ( x - x1 )
y - -7 = (-2/3)(x - 1)
y + 7 = -2/3x + 2/3
y = -2/3x - 19/3
The equation of line which passes through a given point and has a given slope is required.
The required equation is \(y=-\dfrac{2}{3}x-\dfrac{19}{3}\)
The point the line passes though is \((1,-7)\)
\(x_1=1\)
\(y_1=-7\)
m = Slope of the line = \(-\dfrac{2}{3}\)
Point slope form is given by
\(y-y_1=m(x-x_1)\)
Substituting the given values
\(y-(-7)=-\dfrac{2}{3}(x-1)\\\Rightarrow y+7=-\dfrac{2}{3}x+\dfrac{2}{3}\\\Rightarrow y=-\dfrac{2}{3}x+\dfrac{2}{3}-7\\\Rightarrow y=-\dfrac{2}{3}x-\dfrac{19}{3}\)
The required equation is \(y=-\dfrac{2}{3}x-\dfrac{19}{3}\)
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