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If the slope of the line through (2, -7) and (x, 5) is 3 then x = A) 4 B) 5 C) 6 D) 7 |
Answer» Correct option is (C) 6 Slope of line through points (2, -7) and (x, 5) is \(m=\frac{y_2-y_1}{x_2-x_1}\) \(=\frac{5-(-7)}{x-2}=\frac{12}{x-2}\) But given that slope is 3. \(\therefore\) \(\frac{12}{x-2}=3\) \(\Rightarrow x-2=\frac{12}3=4\) \(\Rightarrow x=4+2=6\) Correct option is C) 6 |
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