Q. What is the slope of the line through (−9,6) and (−6,−9)? Choose 1 answer: (A) 51(B) −51(C) 5(D) −5
Identify the slope formula: Identify the slope formula.The slope of a line through two points (x1,y1) and (x2,y2) is given by the formula:Slope = x2−x1y2−y1
Substitute the given points: Substitute the given points into the slope formula.We have the points (−9,6) and (−6,−9), so we assign x1=−9, y1=6, x2=−6, and y2=−9.Slope = −6−(−9)−9−6
Calculate the change in y: Calculate the change in y y2−y1.Change in y = −9−6=−15
Calculate the change in x: Calculate the change in x (x2−x1).Change in x = −6−(−9)=−6+9=3
Calculate the slope: Calculate the slope using the changes in y and x.Slope = 3−15=−5
Match the calculated slope: Match the calculated slope to the given answer choices.The calculated slope is −5, which corresponds to answer choice (D) −5.