How to get an equation of a line of point (0-3) and (4,1)

[Georgiy]

How  to get an equation of a line of point (0-3) and (4,1)

Can anyone help me please

[sangui]

Hi,

You just have to put it in the form

y=ax+b

where a is your slope and b your origin.

in your case :

for x = 0 your y=3 so

y=a*0+b=3

b=3

the for x=4 y=1

y=a*4+3=1

a*4=1-3=-2

a=-2/4

a=-0.5

your equation is y=-0.5x+3

[OldChemE]

if the first point is (0 -3), as stated, then the equation is y = x - 3, not y = 0.5x + 3.  If it was intended to type (0,3), but typed as (0-3) in error, then y = 0.5x + 3 is correct.