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Which of the following is an equation of the line in the 
xy-plane that passes through the point 
(-(1)/(2),2) and is parallel to the line with equation 
y=-8x+3 ?
Choose 1 answer:
(A) 
y=(1)/(8)x+4
(B) 
y=(1)/(8)x+1
(c) 
y=-8x-2
(D) 
y=-8x+2

Which of the following is an equation of the line in the xy x y -plane that passes through the point (12,2) \left(-\frac{1}{2}, 2\right) and is parallel to the line with equation y=8x+3 y=-8 x+3 ?\newlineChoose 11 answer:\newline(A) y=18x+4 y=\frac{1}{8} x+4 \newline(B) y=18x+1 y=\frac{1}{8} x+1 \newline(C) y=8x2 y=-8 x-2 \newline(D) y=8x+2 y=-8 x+2

Full solution

Q. Which of the following is an equation of the line in the xy x y -plane that passes through the point (12,2) \left(-\frac{1}{2}, 2\right) and is parallel to the line with equation y=8x+3 y=-8 x+3 ?\newlineChoose 11 answer:\newline(A) y=18x+4 y=\frac{1}{8} x+4 \newline(B) y=18x+1 y=\frac{1}{8} x+1 \newline(C) y=8x2 y=-8 x-2 \newline(D) y=8x+2 y=-8 x+2
  1. Identify slope of line: Identify the slope of the given line.\newlineThe equation of the given line is y=8x+3y = -8x + 3. This is in slope-intercept form (y=mx+by = mx + b), where mm is the slope.\newlineThe slope of the given line is 8-8.
  2. Determine parallel line slope: Determine the slope of the line that is parallel to the given line.\newlineLines that are parallel have the same slope.\newlineTherefore, the slope of the line we are looking for is also 8-8.
  3. Use point-slope form: Use the point-slope form to find the equation of the line.\newlineThe 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.\newlineWe have the point (12,2)\left(-\frac{1}{2}, 2\right) and the slope 8-8.\newlinePlugging these into the point-slope form gives us (y2)=8(x(12))(y - 2) = -8(x - \left(-\frac{1}{2}\right)).
  4. Simplify equation: Simplify the equation.\newlineFirst, distribute the 8-8: y2=8x8(12)y - 2 = -8x - 8\left(-\frac{1}{2}\right).\newlineSimplify the right side: y2=8x+4y - 2 = -8x + 4.\newlineNow, add 22 to both sides to get yy by itself: y=8x+4+2y = -8x + 4 + 2.\newlineFinally, combine like terms: y=8x+6y = -8x + 6.
  5. Match equation to answer choices: Match the equation to the given answer choices.\newlineThe equation we found is y=8x+6y = -8x + 6.\newlineThis does not match any of the answer choices, indicating a potential error.

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