Let's first write down the given information in the form of an equation:
Jahlil's height = 70 inches
Jahlil's height = 4 times his sister's height - 6 inches
So, we can write the equation as:
70 = 4h - 6
where h represents his sister's height in inches.
Now, let's solve for h:
70 + 6 = 4h
76 = 4h
h = 76/4
h = 19
Therefore, Jahlil's sister's height is 19 inches.
The correct equation that represents h, his sister's height in inches is 1. 4h + 6 = 70.