Tools you use for your system

Pick the tools you will use in each profession. For example, astronomers use  telescope, Electrotechnician use electrocardiogam machine, graphic artist use graphic software etc...

You will chose the correct image for each career you select the tools they use to do their job

This image is used to show in a chart when things change in the system.

In Graphs ,Pie charts , we  measure a system maybe to check growth, health of the system etc.... 

When you study systems, like family,health,sociology, The tools can monitor how  healthy the system or in calculus shows how far or predict like astronomer when things will happen. Like  chest xrays, economy etc...

1. Up and down 

2. From point a to b