Thread: Are my answers correct to these problems?

Write an equation for the given line:

1. P(2,3), m=2
2. P(1,0), no slope
3. P (-1,2), m=-1/2
4. P(2,3), m = 0

1.y=2(x-2)+3
2. y=(x-1)
3. y= -1/2(x+1)+2
4. y=(x-2)+3

no slope or m=0, means the line is horizontal, having the same y-value for all x

so it doesnt depends of x

2 and 4 arent correct

Originally Posted by yitsongg

Write an equation for the given line:

1. P(2,3), m=2
2. P(1,0), no slope
3. P (-1,2), m=-1/2
4. P(2,3), m = 0

1.y=2(x-2)+3
2. y=(x-1)
3. y= -1/2(x+1)+2
4. y=(x-2)+3

The point-slope form of the equation to a line is given by .

The answer you have for the first problem is correct. In the second problem, however, your are asked to find the equation to a line that goes through the point that has no slope. No slope implies that the line is vertical. Thus, the equation is .

Number 3 is correct.

Number 4 is wrong. If I use the formula that I have written at the beginning og this post, I have





This is a horizontal line, as is expected given a slope of 0.

Thanks