Math 1 · Unit 8 · Lesson 4 · part 5 of 5
Practice Problems
Try them, get help one step at a time, then print how it went.
Practice: try it, then get help one step at a time
Who is ahead at a given time, and about when they cross, from equations, a table, or a graph. Hint gives a nudge, Show next step shows one worked step at a time with the calculator keys, Reveal answer checks, and Hide help / start over clears the card. Find crossings with a table or a graph, not algebra.
My results
Finished the practice? Print a page that shows each question, what you typed or chose, the correct answer, and how it went. Good for showing a teacher or keeping in a folder.
Exit ticket
On paper or an index card. Use the math word and the plain-English word.
- Kevin: 100 + 5m. Joseph: 100(1.03)m. Which is linear, which is exponential, and how do you know?
- Who is ahead after 24 months? After 48 months?
- City Bank leads at 10 years and National Bank leads at 15 years. What should a saver conclude?
- Why must the account that multiplies eventually pass the one that adds?
Check your exit ticket
- Kevin is linear (adds $5: constant difference). Joseph is exponential (multiplies by 1.03: constant ratio).
- 24 months: Kevin, $220.00 to $203.28. 48 months: Joseph, $413.23 to $340.00.
- The better account depends on the time: City Bank for 10 years or less, National Bank for longer.
- The adding account's step never changes; the multiplying account's step keeps growing.