Common Mistakes – Algebra 1 Chapter 2 Quiz
1c. The growth factor appears in the equation as
the slope. (This question was thrown out; it
turned into a bonus question, so the quiz was
out of 10 points.)
2a. Slope of the line was -3, so equation should
be y=-3x + 3
2b. Some confused the y-intercept and said it
was 9. (The graph was deceptive, so I did
not take points off if a student said the yintercept was 9 rather than 10.)
3.
Some x-values went up by +2 (with y-values
decreasing by -10), and some x-values went
up by +1 (so y-values should decrease by -5).
4a. Definition of doman (from Chapter 1): all
possible x-values of a function
4b. Definition of range (from Chapter 1): all
possible y-values of a function