Answer:
Step-by-step explanation:
Divide 157 by 8 to see how many groups there are.
157/18=8r13. So you can round up to 9 groups of riders as there is a max of 18 at a time.
Graph A
Its mean graph should intersect x axis at x = 7 and x = - 1. This everything is satisfied by graph A.
Answer:1