how do u workout the equation of a line from a graph?

Question

lgbasallote · Answer

i think point-slope form could work..pick a point on the line then substitute to

y - y1 = m(x-x1)

experimentx · Answer

get any two points, (better distinct)
put those values on y = mx+c ---- 1
get two equations and solve c and m
put the values in 1
you have your equatins

anonymous · Answer

take two points of the line going from left to the right: for example (x,y) and (u,v)
find the slope: (v-y)/(u-x)=m
now plug the value m and (x1,y1) one of your chousen points in to equation @lgbasallote wrote

anonymous · Answer

1) Find x-intercept and y-intercept (can be seen from graph)
2) Calculate slope by using the x-intercept and y-intercept found
3) combine the above result by 
    y=mx+c 
        ^     ^ y-intercept
       Slope

anonymous · Answer

ah thanks i undersand now