Mathematics
Grade10
Easy
Question
Write the equation in point-slope form of the line that passes through the given point and has the given slope:
(-2, -1); m= -3
- y + 1 = -3(x - 2)
- y + 1 = -3(x + 2)
- y - 1 = 3(x - 1)
- y + 2 = -3(x + 1)
Hint:
Point-slope form of equation of a line is y - y1 = m (x - x1) ,
where m is slope and ( x1 , y1 ) is the point .
The correct answer is: y + 1 = -3(x + 2)
Given the Point (-2, -1);
and slope m= -3
Step 1 : Point-slope form of equation of a line is y - y1 = m (x - x1)
Step 2 : Substitute (-2, -1) in (x1, y1) and -3 in m,
we get y + 1 = -3(x + 2)
y + 1 = -3(x + 2) is the desired equation in point slope form .
Point-slope form of equation of a line is y - y1 = m (x - x1),
