# Calculus:Help!

posted by .

Any ideas on how to solve this: Use a vector solution to show that a scalar equation for the line through the points P1(x1, y1) and P2(x2, y2) is  y-y1/x-x1 = y2-y1/x2-x1? Very confused as to what is meant by this question. Thanks.

• Calculus:Help! -

This just says, correctly, thst the change in y from point (x1,y1) is equal to the slope times the change in x from that point.

The slope of the line is (y2-y1)/(x2-x1)

## Similar Questions

1. ### algebra

how would i find an equation of a line that goes through points(1,6) and (3,10)?
2. ### Math- Intesection of a plane and line

Does the line [x,y,z]=[5,-9,3]+k[1,-12,2] intersect the plane [x,y,z]=[4,-15,8]+s[1,-3,1]+t[2,3,1]?
3. ### Math - Equations of plane(check)

Consider the plane that contains points A(2,3,1), B(-11,1,2), C(-7,-3,-6). a) Find two vectors that are parallel to the plane. Ans: AC, BC or AB will be parallel to the plane. b) Find two vectors that are perpendicular to the plane. …
4. ### Math - Equations of plane(check)

Consider the plane that contains points A(2,3,1), B(-11,1,2), C(-7,-3,-6). a) Find two vectors that are parallel to the plane. Ans: AC, BC or AB will be parallel to the plane. b) Find two vectors that are perpendicular to the plane. …
5. ### Math/Vectors

I need help on a homework problem. "Determine a vector equation for the line perpendicular to 4x-3y=17 and through point (-2,4). The answer in the book is given as [x,y]=[-2,4]+t[-4,3].Isn't the normal to the scalar equation [4,-3] …
6. ### Calculus

Write a vector equation AND parametric equations of the line through the points A(6,-1,5) and B(-2,-3,6) direction vector = [8,2,-1] a vector equation r = (6,-1,5) + t(8,2,-1) use that to write the parametrics how do i write parametrics
7. ### Calculus 3

Let L be the line that passes through the points (0,1,6) and (0,3,2). Find the length of the projection of k=<0,0,1> on the line L. I know how to do this if one part of the vector k is touching the line, but unless i'm mistaken, …
8. ### Physics

What are the products (either vector or scalar for each answer) of: a) scalar x scalar b) scalar x vector c) vector x vector A simple concept, but I want to be sure I get it right! Thanks for any help :)
9. ### calculus

for f(x)=5/8, a. find an equation for the secant line through points where x=4 and x=5.b. find an equation for the line tangent to the curve when x=4. I can solve part a., but I am confused on part b. please help. I don't understand …
10. ### Maths Vector Helpppp

The points A and B have position vectors, relative to the origin O, given by −−→OA = i+2j+3k and −−→OB = 2i+j+3k. The line l has vector equation r = (1−2t)i+ (5+t)j+ (2−t)k. (i) Show …

More Similar Questions