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Line 
ℓ has equation 
y=x-3. Find the distance between 
ℓ and the point 
E(-1,3).
Round your answer to the nearest tenth

Line \ell has equation y=x3 y=x-3 . Find the distance between \ell and the point E(1,3) E(-1,3) .\newlineRound your answer to the nearest tenth

Full solution

Q. Line \ell has equation y=x3 y=x-3 . Find the distance between \ell and the point E(1,3) E(-1,3) .\newlineRound your answer to the nearest tenth
  1. Write Equation and Coordinates: Write down the equation of line \ell and the coordinates of point E.\newlineLine \ell: y=x3y = x - 3\newlinePoint E: (1,3)(-1, 3)
  2. Determine Line Slope: Determine the slope of line \ell. The slope of line \ell is the coefficient of xx in the equation y=x3y = x - 3, which is 11.
  3. Find Perpendicular Slope: Find the slope of the line perpendicular to line \ell. The slope of a line perpendicular to another line is the negative reciprocal of the original line's slope. Since the slope of line \ell is 11, the slope of the perpendicular line is 1-1.
  4. Write Perpendicular Line Equation: Write the equation of the line perpendicular to line \ell that passes through point E(1,3)E(-1, 3).\newlineUsing the point-slope form of a line's equation, 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 get:\newliney3=1(x(1))y - 3 = -1(x - (-1))\newliney3=1(x+1)y - 3 = -1(x + 1)
  5. Simplify Perpendicular Line: Simplify the equation of the perpendicular line. \newliney3=x1y - 3 = -x - 1\newliney=x+2y = -x + 2\newlineThis is the equation of the line perpendicular to line \ell that passes through point E.
  6. Find Point of Intersection: Find the point of intersection between line \ell and the perpendicular line.\newlineTo find the intersection, set the equations of line \ell and the perpendicular line equal to each other:\newlinex3=x+2x - 3 = -x + 2\newline2x=52x = 5\newlinex=52x = \frac{5}{2}\newlineNow, substitute xx back into the equation of line \ell to find yy:\newliney=(52)3y = \left(\frac{5}{2}\right) - 3\newliney=5262y = \frac{5}{2} - \frac{6}{2}\newline\ell00\newlineThe point of intersection is \ell11.
  7. Calculate Distance: Calculate the distance between point E and the point of intersection.\newlineUse the distance formula: d=((x2x1)2+(y2y1)2)d = \sqrt{((x_2 - x_1)^2 + (y_2 - y_1)^2)}, where (x1,y1)(x_1, y_1) is point E and (x2,y2)(x_2, y_2) is the point of intersection.\newlined=((5/2(1))2+(1/23)2)d = \sqrt{((5/2 - (-1))^2 + (-1/2 - 3)^2)}\newlined=((5/2+1)2+(1/23)2)d = \sqrt{((5/2 + 1)^2 + (-1/2 - 3)^2)}\newlined=((5/2+2/2)2+(1/26/2)2)d = \sqrt{((5/2 + 2/2)^2 + (-1/2 - 6/2)^2)}\newlined=((7/2)2+(7/2)2)d = \sqrt{((7/2)^2 + (-7/2)^2)}\newlined=(49/4)+(49/4)d = \sqrt{(49/4) + (49/4)}\newlined=(98/4)d = \sqrt{(98/4)}\newlined=(49/2)d = \sqrt{(49/2)}\newline(x1,y1)(x_1, y_1)00\newline(x1,y1)(x_1, y_1)11\newlineRound to the nearest tenth: (x1,y1)(x_1, y_1)22

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