Q. What is the equation of the line that passes through the point (−6,−2) and has a slope of −21 ?Answer:
Identify slope and point: Identify the slope m and the point (x1,y1) through which the line passes.The slope m is given as −21, and the point is (−6,−2).
Use point-slope form: Use the point-slope form of the equation of a line to plug in the values of the slope and the point.The point-slope form is y−y1=m(x−x1).Substitute m=−21, x1=−6, and y1=−2 into the equation to get y−(−2)=−21(x−(−6)).
Simplify the equation: Simplify the equation from Step 2.y+2=−21(x+6).Now distribute the slope −21 across (x+6) to get y+2=−21x−3.
Solve for y: Solve for y to put the equation in slope-intercept formy=mx+b.Subtract 2 from both sides of the equation to isolate y.y=−21x−3−2.y=−21x−5.
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