Answer:
1. r is point
2.PQ is ray
3. pr is line
4. p.q,r is collnear points
5. QR is segment
400/100=4 so 4 workers are = to 1%
72×4=288 workers are part time
400-288=112 full time workers
Well - I mean. If every lunch costs $4 that means that the relationship should be linear.
You used to be able to draw graphs. But plot it out.
