Math 1 · Unit 10 · Lesson 2 · 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
Say what the slope and y-intercept mean, predict forward and backward, and judge the prediction. Hint gives a nudge, Show next step shows one worked step at a time, Reveal answer checks, and Hide help / start over clears the card.
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.
- What makes the least squares line the best line?
- A plant's height is modeled by H = 5 + 2w (centimeters, weeks). What do 2 and 5 mean?
- Predict the height at week 6, and find the week it reaches 25 cm.
- The plant was measured in weeks 0 to 8. Is week 6 interpolation or extrapolation? Week 100? Does week 100 make sense?
Check your exit ticket
- It makes the total of the squared distances from the points to the line as small as possible.
- It grows about 2 cm a week; it was about 5 cm tall at week 0.
- H = 17 cm. 5 + 2w = 25, so w = 10.
- Week 6: interpolation. Week 100: extrapolation; 205 cm is not believable for this plant.