Q. What is the equation of the line that passes through the point (−2,−4) and has a slope of 1 ?Answer:
Identify slope and point: Identify the slope m and the point (x1,y1) through which the line passes.We have:Slope m: 1Point (x1,y1): (−2,−4)We will use the point-slope form of the equation of a line to find the equation.Point-slope form: y−y1=m(x−x1)
Substitute slope and coordinates: Substitute the slope and the coordinates of the point into the point-slope form equation.Using the point (−2,−4) and the slope 1, we get:y−(−4)=1(x−(−2))Simplify the equation by removing the parentheses and combining like terms.y+4=1(x+2)
Distribute slope: Distribute the slope 1 on the right side of the equation.y+4=1×x+1×2This simplifies to:y+4=x+2
Isolate y: Isolate y to get the equation in slope-intercept form (y=mx+b).Subtract 4 from both sides of the equation to solve for y.y=x+2−4Combine like terms:y=x−2
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