Track quiz
Eight quick questions, one for each idea. Use the table if you get stuck.
| Idea | Remember |
|---|---|
| Polynomial | A sum of terms. Each power is a whole number. |
| Degree | The highest power of the letter. |
| Linear rule | y = ax + b. Multiply first, then add. |
| A table | Equal steps in give equal steps out. |
| A point | (input, output), in that order. |
| Slope | a is the change for each step. Its sign sets the lean. |
| y-intercept | b is the output at input zero. |
| Limits | A rule fits only while its answers make sense. |
Which of these is a polynomial?
What is the degree of 3x² − 4x + 7?
What is the value of 4x − 3 at x = 2?
Which of these tables is linear?
For y = 2x + 3, the pair at x = 3 is (3, 9). Where does it go on the grid?
What is the slope of y = 12 − 2x?
Where does y = 3x − 2 cut the y-axis?
A balance follows y = 100 − 20t. What does day 6 give?
Chapter 2 is Ganita Manjari's Introduction to Linear Polynomials. See which of these ideas its exercises use most.
Next: The World of Numbers. It sorts the numbers you have been putting into these rules.