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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 ?

Line g g has an equation of y=2x+1 y=2 x+1 . Line h h includes the point (5,2) (-5,2) and is perpendicular to line g \mathrm{g} . What is the equation of line h \mathrm{h} ?

Full solution

Q. Line g g has an equation of y=2x+1 y=2 x+1 . Line h h includes the point (5,2) (-5,2) and is perpendicular to line g \mathrm{g} . What is the equation of line h \mathrm{h} ?
  1. Determine slope of line gg: Determine the slope of line gg. The equation of line gg is given by y=2x+1y = 2x + 1. The slope of a line in the form y=mx+by = mx + b is mm, where mm is the coefficient of xx. Therefore, the slope of line gg is 22.
  2. Find slope of line hh: Find the slope of line hh.\newlineSince line hh is perpendicular to line gg, its slope will be the negative reciprocal of the slope of line gg. The negative reciprocal of 22 is 12-\frac{1}{2}.
  3. Use point-slope form: Use the point-slope form to write the equation of line hh. The point-slope form of a line is yy1=m(xx1)y - y_1 = m(x - x_1), where mm is the slope and (x1,y1)(x_1, y_1) is a point on the line. We have the slope of line hh as 12-\frac{1}{2} and the point (5,2)(-5, 2). Plugging these values into the point-slope form gives us y2=12(x(5))y - 2 = -\frac{1}{2}(x - (-5)).
  4. Simplify equation of line h: Simplify the equation of line h. Simplify the equation from the previous step to get y2=12(x+5)y - 2 = -\frac{1}{2}(x + 5). Distribute the slope 12-\frac{1}{2} across (x+5)(x + 5) to get y2=12x52y - 2 = -\frac{1}{2}x - \frac{5}{2}.
  5. Solve for y: Solve for y to put the equation in slope-intercept form.\newlineAdd 22 to both sides of the equation to isolate yy on one side: y=12x52+2y = -\frac{1}{2}x - \frac{5}{2} + 2. Simplify the constant terms: y=12x52+42y = -\frac{1}{2}x - \frac{5}{2} + \frac{4}{2}. This simplifies to y=12x12y = -\frac{1}{2}x - \frac{1}{2}.

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