Final answer:
The grid ratio represented in Figure 4-8 is 1:4.
Step-by-step explanation:
The grid ratio represented in Figure 4-8 is 1:4.
To determine the grid ratio, you can use proportions. Given the information provided, the length of the scale is 8 units and the actual length is 1 unit. By setting up the proportion scale/actual = 8/1, you can solve for the scale factor, which is the grid ratio. In this case, the scale factor is 1:4.
It's important to note that the scale factor represents how the measurements on a map or diagram compare to the actual measurements in real life.