Hi I am have troubles solving for a and b.
Sections 1,2 and 3 all join and are continuous. At points B and C the gradient at the end of one function is the same as the gradient at the beginning of the next.
For section 1, i.e. A to B, y=0.01x^2-1.2x+50
For section 2, i.e. B to C, y=ax^2+bx-250
For section 3, i.e. C to D, y=cx^2+dx+605
Point A is ( 0,e=50 )
Point B is ( 100,f=30)
Point C is ( 150,g )
Point D is ( h,0 )
I found e=50 and f =30.
I cant solve for the other unknowns??