Yxcas's answer to Stressful's Secondary 4 E Maths Singapore question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Yxcas
Yxcas's answer
184 answers (A Helpful Person)
1st
Just work backwards to find the old score.
Old score = (37 - 15) x 2 = 44
Based on the graph is 90? (You double check, abit small to see here)