HELLP PLEASE I NEED THIS Which of these pairs of points defines a line with a slope of -1? A. (3, 10) and (3, 5

Question

HELLP PLEASE I NEED THIS   Which of these pairs of points defines a line with a slope of -1?   A. (3, 10) and (3, 5)   B. (3, 10) and (5, 3)   C. (10, 3) and (15, -2)   D. (10, 3) and (3, 5)

thucuc · Answer

Answer:   C     Step-by-step explanation:        mathsf{slope= dfrac{y_2-y_1}{x_2-x_1}}  where  mathsf{(x_1,y_1)} and  mathsf{(x_2,y_2)} are points on the line    A.    mathsf{slope= dfrac{5-10}{3-3}= dfrac{-5}{0}}   slope is undefined    B.   mathsf{slope= dfrac{3-10}{5-3}=- dfrac72}    C.    mathsf{slope= dfrac{-2-3}{15-10}=-1}    D.   mathsf{slope= dfrac{5-3}{3-10}=- dfrac27}

Gerda · Answer

Answer:   C   Step-by-step explanation:   A.   (10-5)÷(3-3) = 5÷0 = Undefined  B.   (10-3)÷(3-5) = 7÷-2 = -3.5  C.   (3-(-2))÷(10-15) = 5÷-5 = -1  D.   (3-5)÷(10-3) = -2÷7 = -²/7  Line slope calculation formula: The difference of the second components is divided by the difference of the first components.

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