Question

B) Write an equation of the line that crosses the graph of f(x) at x=-1 and x=2​

Answer 1

Explanation:

let it passes through (-1,y1) and (2,y2)

`slope=(y2-y1)/(x2-x1) =(y2-y1)/(2-(-1)) =(y2-y1)/(3) \\eq. ~of~line~is~\\y-y1=(y2-y1)/(3) (x+1)\\3y-3y1=xy2-xy1+y2+y1\\3y=(y2-y1)x+y2+4y1`