Q. Use point-slope form to write the equation of a line that passes through the point (18,−3) with slope −2 .Answer:
Recall Point-Slope Form: Recall the point-slope form of a line's equation. The point-slope form of a line's equation is given by: y−y1=m(x−x1), where m is the slope and (x1,y1) is a point on the line.
Identify Slope and Point: Identify the slope (m) and the point (x1,y1) through which the line passes.Slope (m): −2Point (x1,y1): (18,−3)
Substitute into Equation: Substitute the slope and point into the point-slope form equation.Using the point-slope form, y−y1=m(x−x1), we substitute m=−2, x1=18, and y1=−3.y−(−3)=−2(x−18)
Simplify the Equation: Simplify the equation.y+3=−2(x−18)y+3=−2x+36
Write Final Equation: Write the final equation in point-slope form.The final equation of the line in point-slope form is:y+3=−2x+36
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