Answer:
Use “a” before words that start with a consonant sound and “an” before words that start with a vowel sound. Other letters can also be pronounced either way. Just remember it is the sound that governs whether you use “a” or “an,” not the actual first letter of the word.
Step-by-step explanation:
Example....
I am a part of a secret society that makes homemade pizza every Sunday.
The graph is used using an exponential function instead of a linear function.