Q. Line g has an equation of y=2x+1. Line h includes the point (−5,2) and is perpendicular to line g. What is the equation of line h ?
Determine slope of line g: Determine the slope of line g. The equation of line g is given by y=2x+1. The slope of a line in the form y=mx+b is m, where m is the coefficient of x. Therefore, the slope of line g is 2.
Find slope of line h: Find the slope of line h.Since line h is perpendicular to line g, its slope will be the negative reciprocal of the slope of line g. The negative reciprocal of 2 is −21.
Use point-slope form: Use the point-slope form to write the equation of line h. The point-slope form of a line is y−y1=m(x−x1), where m is the slope and (x1,y1) is a point on the line. We have the slope of line h as −21 and the point (−5,2). Plugging these values into the point-slope form gives us y−2=−21(x−(−5)).
Simplify equation of line h: Simplify the equation of line h. Simplify the equation from the previous step to get y−2=−21(x+5). Distribute the slope −21 across (x+5) to get y−2=−21x−25.
Solve for y: Solve for y to put the equation in slope-intercept form.Add 2 to both sides of the equation to isolate y on one side: y=−21x−25+2. Simplify the constant terms: y=−21x−25+24. This simplifies to y=−21x−21.
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