Question

a. Find the slope of the line passing through the points (7,–4) and (–6,–7).

Answer 1

Slope is \[\frac{ \Delta y }{ \Delta x }\]

Answer 2

woah. >3<

Answer 3

Do you know what to do now?

Answer 4

now madam.. :/

Answer 5

\[m=\frac{ y2-y1 }{ x2-x1}\]
slope=m
you have two points (x1,y1) and (x2,y2)
input in the values
\[m=\frac{ -7-(-4) }{ -6-7 }\]

Answer 6

\[m=\frac{ -3 }{ -13 }\]
\[m=\frac{ 3 }{ ? }\]

Answer 7

m=3/13

Answer 8

so the answe is 3/13?

Answer 9

yep
got any questions?

Answer 10

none.. but could you help me with this one?
Solve the given linear system
2x-4y=-6
-x+2y=3

Answer 11

you can use substitution for that one.
Take one of the equations and isolte y to one side
(im going to use second one)
2y=x+3
y=(x+3)/2
and now you substitue y in the first equation
2x-4((x=3)/2))=-6
Solve for x, and when you get x, plug it into the second equation and solve

Answer 12

isolate*

Answer 13

by the way if (x1,y1)& (x2,y2) is like this then the given is (7,–4) and (–6,–7).

Answer 14

thanks...

Answer 15

yep^
and you can also try using elimination to solve it...

Answer 16

how to do the elimination method?

Answer 17

you would add and subtract the equations to cancel out a variable
to do this you may have to multiply an equation or two for them to cancel each other out but for this set of equations are the same so you'd have infinite solutions

Answer 18

could you give me some sample?

Answer 19

ya
check this site out
http://www.mathportal.org/algebra/solving-system-of-linear-equations/elimination-method.php
it gives you a pretty good step by step procedure

Answer 20

thanks.. :D