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What is the slope of the line through 
(-7,-2) and 
(-6,7) ?
Choose 1 answer:
(A) 
(1)/(9)
(B) 9
(c) 
-(1)/(9)
(D) -9

What is the slope of the line through (7,2)(-7,-2) and (6,7)(-6,7)?\newlineChoose 11 answer:\newline(A) 19\frac{1}{9}\newline(B) 99\newline(C) 19-\frac{1}{9}\newline(D) 9-9

Full solution

Q. What is the slope of the line through (7,2)(-7,-2) and (6,7)(-6,7)?\newlineChoose 11 answer:\newline(A) 19\frac{1}{9}\newline(B) 99\newline(C) 19-\frac{1}{9}\newline(D) 9-9
  1. Identify Slope Formula: To find the slope of the line through two points, we use the formula for slope mm, which is the change in yy divided by the change in xx, or m=y2y1x2x1m = \frac{y_2 - y_1}{x_2 - x_1}, where (x1,y1)(x_1, y_1) and (x2,y2)(x_2, y_2) are the coordinates of the two points.
  2. Plug in Coordinates: Let's plug in the coordinates of the two points into the slope formula. For the points (7,2)(-7,-2) and (6,7)(-6,7), we have x1=7x_1 = -7, y1=2y_1 = -2, x2=6x_2 = -6, and y2=7y_2 = 7.
  3. Calculate Change in y: Now we calculate the change in y, which is y2y1=7(2)=7+2=9y_2 - y_1 = 7 - (-2) = 7 + 2 = 9.
  4. Calculate Change in x: Next, we calculate the change in xx, which is x2x1=6(7)=6+7=1x_2 - x_1 = -6 - (-7) = -6 + 7 = 1.
  5. Find Slope: We can now find the slope by dividing the change in yy by the change in xx: m=y2y1x2x1=91=9m = \frac{y_2 - y_1}{x_2 - x_1} = \frac{9}{1} = 9.
  6. Final Result: The slope of the line through the points (7,2)(-7,-2) and (6,7)(-6,7) is 99, which corresponds to choice (B)(B).

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