Unit 5, Lesson 2
Understanding Points in Situations
Extra Support Materials for Algebra 1
2.1
Warm-up
A Day of Temperature
The temperature for a city is a function of time after midnight. The graph shows the values on a particular spring day.
Graph, origin O. Horizontal axis, 0 to 22, by 2’s, time after midnight, hours. Vertical axis, 0 to 22, by 2’s, temperature, Celsius. Points of the graph include: 0 comma 15, 1 comma 14, 2 comma 14, 3 comma 13, 4 comma 14, 5 comma 12, 6 comma 12, 7 comma 12, 8 comma 14, 9 comma 16, 10 comma 18, 11 comma 19, 12 comma 20, 13 comma 21, 14 comma 21, 15 comma 21, 16 comma 21, 17 comma 20, 18 comma 19, 19 comma 18, 20 comma 15, 21 comma 14, 22 comma 13, 23 comma 12, and 24 comma 12.
- What does the point on the graph where
- What is the temperature at 5 p.m.?
- What is the hottest it gets on this day?
- What is the coldest it gets on this day?