Point slope

Flo Rida

Junior Member
Write an equation in point-slope form for the line that passes through the point with the given slope. (3, 0), m = 1

I got y+3=x. Am I correct?

HallsofIvy

Elite Member
Yes, although it is more common to write y= x- 3, that is a perfectly good answer.

Flo Rida

Junior Member
But that is one of the other choices, which should I pick?

Flo Rida

Junior Member
One of them is slope intercept and the other is point slope. I need to pick point slope. But now I don’t know which is which for sure

Anyone?

HallsofIvy

Elite Member
"Point slope" is not either y= x- 3 or x= y+ 3. Point slope is $$\displaystyle y- y_0= m(x- x_0)$$, where m is the slope and $$\displaystyle (x_0, y_0)$$ is a point the line goes through. Here that would be $$\displaystyle y- 0= 1(x- 3)$$.

Flo Rida

Junior Member
Okay, so I’ll just have to see how it goes. Thankfully, this question won’t make a dent in my grade in case it is a perspective issue

JeffM

Elite Member
What are the DEFINITIONS of slope-intercept form and point-slope form?

Flo Rida

Junior Member
Slope intercept:
the equation of a straight line in the form y = mx + b where m is the slope of the line and b is its y-intercept

point slope:
the equation of a straight line in the form y − y1 = m(x − x1) where m is the slope of the line and (x1, y1) are the coordinates of a given point on the line

Jomo

Elite Member
But that is one of the other choices, which should I pick?
If you give us all the choices then we can do a better job helping you.

Flo Rida

Junior Member
 y = x - 3
 y = x + 3
 y - 3 = x
 y + 3 = x

1st one

Jomo

Elite Member
It is not in point-slope format.