Q. The equation of line u is 2x+9y=5. Line v is parallel to line u and passes through (−9,−5). What is the equation of line v ?
Find Slope of Line u: Determine the slope of line u. Line u has the equation 2x+9y=5. To find the slope, we need to rewrite this equation in slope-intercept form, which is y=mx+b, where m is the slope.
Convert to Slope-Intercept Form: Convert the equation of line u into slope-intercept form. Starting with 2x+9y=5, we subtract 2x from both sides to get 9y=−2x+5. Then, we divide both sides by 9 to isolate y, which gives us y=(−2/9)x+5/9. The slope of line u is −2/9.
Parallel Line v Slope: Since line v is parallel to line u, it will have the same slope.The slope of line v is also −92.
Use Point-Slope Form: Use the point-slope form to find the equation of line v. 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 know that line v passes through the point (−9,−5) and has a slope of −92.
Plug Slope and Point: Plug the slope and the point into the point-slope form equation.Using the point (−9,−5) and the slope −92, we get y−(−5)=(−92)(x−(−9)).
Simplify Point-Slope Equation: Simplify the equation from the previous step.This simplifies to y+5=(−92)(x+9).
Distribute Slope: Distribute the slope on the right side of the equation.This gives us y+5=(−92)x−(92)(9).
Simplify Constant Term: Simplify the constant term on the right side of the equation. Multiplying −92 by 9 gives us −2. So the equation becomes y+5=(−92)x−2.
Solve for y: Subtract 5 from both sides to solve for y and put the equation in slope-intercept form.This gives us y=(−2/9)x−2−5, which simplifies to y=(−2/9)x−7.
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