Q. The points (−1,−10) and (−3,p) fall on a line with a slope of −3. What is the value of p?p=___
Use Slope Formula: To find the value of p, we can use the slope formula, which is x2−x1y2−y1=slope, where (x1,y1) and (x2,y2) are the coordinates of two points on the line.
Plug in Values: We know the slope of the line is −3, and we have the coordinates of one point (−1,−10) and the x-coordinate of the second point (−3). We can plug these values into the slope formula to find p (y2).
Simplify Equation: Using the slope formula with our known values, we get (−10−p)/(−1−(−3))=−3. Simplifying the denominator, we have (−10−p)/(2)=−3.
Multiply by 2: To find the value of p, we need to solve the equation (−10−p)/2=−3. We can start by multiplying both sides of the equation by 2 to get rid of the denominator.
Add 10: Multiplying both sides by 2 gives us −10−p=−3×2, which simplifies to −10−p=−6.
Isolate p: Now, we can add 10 to both sides of the equation to isolate p on one side. This gives us −p=−6+10.
Solve for p: Solving for p, we get −p=4. To get p, we multiply both sides by −1, which gives us p=−4.
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