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

Which of the following is an equation of the line in the xy x y -plane that passes through the point (1,1) (1,1) and is parallel to the line with equation y=3x1 y=-3 x-1 ?\newlineChoose 11 answer:\newline(A) y=13x+4 y=\frac{1}{3} x+4 \newline(B) y=13x+1 y=\frac{1}{3} x+1 \newline(C) y=3x+4 y=-3 x+4 \newline(D) y=3x+1 y=-3 x+1

Full solution

Q. Which of the following is an equation of the line in the xy x y -plane that passes through the point (1,1) (1,1) and is parallel to the line with equation y=3x1 y=-3 x-1 ?\newlineChoose 11 answer:\newline(A) y=13x+4 y=\frac{1}{3} x+4 \newline(B) y=13x+1 y=\frac{1}{3} x+1 \newline(C) y=3x+4 y=-3 x+4 \newline(D) y=3x+1 y=-3 x+1
  1. Identify slope of given line: The question prompt is: "What is the equation of the line that passes through the point (1,1)(1,1) and is parallel to the line with equation y=3x1y = -3x - 1?"
  2. Determine slope of parallel line: Identify the slope of the given line.\newlineThe equation of the given line is y=3x1y = -3x - 1, which is in slope-intercept form y=mx+by = mx + b, where mm is the slope.\newlineThe slope of the given line is 3-3.
  3. Use point-slope form to find equation: 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 3-3.
  4. Simplify equation to slope-intercept form: Use the point-slope form of the equation of a line to find the equation of the line that passes through the point (1,1)(1,1) with the slope 3-3.\newlineThe point-slope form is yy1=m(xx1)y - y_1 = m(x - x_1), where (x1,y1)(x_1, y_1) is a point on the line and mm is the slope.\newlineSubstitute (1,1)(1,1) for (x1,y1)(x_1, y_1) and 3-3 for mm.\newliney1=3(x1)y - 1 = -3(x - 1)
  5. Compare equation with answer choices: Simplify the equation to get it into slope-intercept form y=mx+by = mx + b.\newliney1=3x+3y - 1 = -3x + 3\newlineAdd 11 to both sides to isolate yy.\newliney=3x+3+1y = -3x + 3 + 1\newliney=3x+4y = -3x + 4
  6. Compare equation with answer choices: Simplify the equation to get it into slope-intercept form y=mx+by = mx + b.\newliney1=3x+3y - 1 = -3x + 3\newlineAdd 11 to both sides to isolate yy.\newliney=3x+3+1y = -3x + 3 + 1\newliney=3x+4y = -3x + 4 Compare the equation y=3x+4y = -3x + 4 with the answer choices.\newlineThe correct answer choice will have the same slope 3-3 and y-intercept 44.\newlineThe correct answer is (C) y=3x+4y = -3x + 4.

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