Question

write an equation in the form y=mx+b for the line which contains the point (6,-8) and (-2,-12)

Answer 1

i need help

Answer 2

do you know what the form of the equation
y=mx+b
means?

Answer 3

no i do not

Answer 4

so - you are studying straight line equations

have you seen the equation y=mx + b before?

Answer 5

yes i have but i honestly dont really get it

Answer 6

do you know what the slope of a straight line is?

Answer 7

are you talking bout the y1,y2/x1,x2

Answer 8

yes - that is correct (but it is y1-y2/x1-x2)

you can use the 2 points you are given to work out the slope from that equation

Answer 9

fill in the numbers - from the points:

x1=
x2=
x1-x2=

y1=
y2=
y1-y2=

y1-y2/x1-x2 =

Answer 10

ok give me a min im going to do it

Answer 11

my answer is 0.5

Answer 12

that is good - correct

now in the equation
y=mx +b

the slope is the value m

so you can start to make the equation

y= 0.5x +b

OK so far?

Answer 13

so should i make -12 or -8 my y intercept

Answer 14

so - don't rush ahead...

the equation is
y=0.5x+b

and you know that the point (6,-8) is on th eline so you can fill in some numbers:

-8 = 0.5(6) +b

(that is th esame equation but we pput the values from one of the known points in

OK?
so now you can work out b from that equation...