Q. What is the equation of the line that passes through the point (−3,−7) and has a slope of −31 ?Answer:
Identify slope and point: Identify the slope and the point through which the line passes. The slope m is given as −31, and the point is (−3,−7).
Use slope-intercept form: Use the slope-intercept form of a line equation.The slope-intercept form is y=mx+b, where m is the slope and b is the y-intercept.
Substitute slope and point: Substitute the slope and the coordinates of the given point into the equation to find the y-intercept b. Using the point (−3,−7), we substitute into the equation: −7=−31×(−3)+b.
Solve for y-intercept: Solve for b.−7=1+bSubtract 1 from both sides to isolate b.−7−1=b−8=b
Write final line equation: Write the final equation of the line using the slope and the y-intercept.Now that we have the slope, m=−31, and the y-intercept, b=−8, we can write the equation as:y=−31x−8
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