Question

Given the ordered pairs (-1,1), (0,3), (1,5), (2,7), what is the equation of the line

Answer 1

slope  is  7-5 / 2-1 = 2/1  = 2  
and y intercept is y = 3  ( because of the point (0.,3) being on the line 

the  equation   in slope intercept form is
y = mx + c   where m =2 and c = 3
answer is:-

y = 2x + 3