write an equation in y=mx+b form using a data table.

Question

Write the equation in slope-intercept form for the following data:

 

(-1,1)  (3,-2)   (7,-5)

 

 

Answer 1

using y=mx+b for the first point

-1=m+1

second point

3=-2m+b

solve for m and b 

m=-4/3

b=1/3

then y=-4/3 x+ 1/3