Graph y = a^x or y = a(b)^x and click the point or intercept the item asked for. Desmos handles the growth; you match the last sentence. Desmos access is in Desmos on the ACT.
Type the model as written
Parentheses matter: 2^3x is not 2^(3x). Evaluate a year or a time by clicking the point, or type the x-value. Growth and decay as algebra are in exponential growth and decay.
Logs invert exponentials, in logs in Desmos. If the curve is off the screen, set the window, in setting the window.
The bottom line
Graph the exponential. Click the point. Watch the parentheses.
Start practicing
Start with a free diagnostic, then drill your weak spots with 15-question quizzes and track how you're doing across Reading, English, and Math. Compare plans whenever you're ready to go further.
This article offers general ACT prep guidance. The ACT can change from year to year, including its format, scoring, policies, test dates, and fees, so always confirm the latest details on the official ACT website at act.org before you make decisions. ACT® is a registered trademark of ACT, Inc. thirty-six is not affiliated with, endorsed by, or sponsored by ACT.