WELCOME TO MATH CLASS!!

Please do the following:1) Take out your 1.3

homework and a grading tool

2) Take out your DEAR book and read

LET’S CHECK OUR HOMEWORK…

Reminders: Always grade in a pen, marker, or other

colored writing tool Always make corrections and clarifications

to your answers Be honest with yourself because YOU are

ultimately responsible for knowing the material!

4 ) a (graph of Katrina’s Height)

A. (graph on pervious slide)

B. Birth to age 1.

C. 14-16 & 17-18, no increase.

D. Yes, continuous variables.

E. Graph- information is easy to see in the graph. -or- Table - easier to find exact answers.

5) EFFECT OF TIDE WATER DEPTH A) 6 hours after midnight, or 6:00 am; 16.2 m B) noon; 10.0 m C) The water depth changes most rapidly-by 1.7 m- from 2:00

am to 3:00 am (2 to 3), 8:00 am to 9:00 am (8to 9), and from 2:00 pm- 3:00 pm (14 to 15)

D) (Graph below). The graph has 2 “humps”. It looks symmetric, so if it were flipped over x = 12 (hour 12) the two parts would align. The graph rises until 6, falls until hour 12, rises again to hour 18, then falls again.

E) Possible: I used 1-hr intervals of time on the x-axis for the independent variable; I used 2-meter intervals on the y-axis for the dependent variable. Both scales made it easy for me to fit all the data on my graph.

26) A & B--DAYLIGHT HOURS A) The hours of daylight are least in Jan.

and Dec. They are greatest in June. The hours of light change most rapidly (by 1.5 hours) from Feb. to Mar. and Sep. to Apr.

B) (Graph below) The number of hours of light increases slowly from Jan. to Jun. and reaches a peak at Jun. It decreases slowly from Jun. to Dec.

26) C & D DAYLIGHT HOURS

C)

D)

OPEN YOUR NOTEBOOK TO THE WARM-UP SECTION

Title today’s warm-up as…

Workbook p.3 (a-c)

WB: P. 3A ANSWERS…

Age (in months) is _______________, so it goes on the __-axis. I used a scale of ___.

The number of words Sarah can say is _____________ on how old she is, so it is the ___-axis variable. I used a scale of ___ for the y-axis.

WB P.3 B AND C ANSWERS…

B) The amount of words Sarah could say increased slowly at first, but then began to rapidly increase.

C) Most words: from 21 to 22 months (17 words)

Least words: from 12 to 13 months (0 words)

Make sure your notebook cover sheet looks like this:

#. Date Book/ Brief Description1. 8/31 V&P Problem 1.12. 9/1 V&P Problem 1.2, ACE 1-3 & 18-203. 9/2 V&P Problem 1.3, ACE 4, 5, 26 4. 9/7 V&P Problem 1.4, ACE 6-9, 27

Open your textbooks to Page 12

You Need: Calculator1.4 Handout-(back of

Labsheet 1.3)

Big Idea: Reading Data From Graphs

8

Dis

tan

ce in

Miles

Time in Hours

Day One

x

y

o0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

50

40

30

20

10

Discrete Variable - something IS NOT happening all the time. For example: counting people

Continuous Variable - something IS happening all the time.

For example: time, distance, temperature

Miller's Pharmacy

Court House

Parking

Parking

Time in Minutes

5 10 15 20 25 30 40 50 60

Dis

tan

ce in

Miles

5040302010

Distance from the House

Time in Minutes

5 10 15 20 25 30 40 50 60

Dis

tan

ce in

Miles

5040302010

Distance from the House

Start

Stop

CLASS WORK: YOU AND A PARTNER WILL ANSWER PROBLEM 1.4 (A-F) FOUND ON PAGE 13 IN YOUR TEXTBOOK

Each of you is responsible to write your answers in the “Problems/ ACE” section of your own notebook

Yes, Both are continuous variables. There is something happening between the points.

They forgot something and had to go back and get it.

They had to go back to use the restroom.

They went the wrong way, realized it, turned around and went back.

Mechanical problems with a bike.

Most - 4.0 - 4.5 hours.

Least 1.5-2.0 & 4.5-5.0

Table - you can see the actual numbers.

Graph - easy to see the progress,easy to see the stops, how much they increased or decreased.

81 miles; I looked at the last plotted point (7.5 hours) and matched it to the distance on the y-axis.

Make sure your notebook cover sheet looks like this:

#. Date Book/ Brief Description1. 8/31 V&P Problem 1.12. 9/1 V&P Problem 1.2, ACE 1-3 & 18-203. 9/2 V&P Problem 1.3, ACE 4, 5, 26 4. 9/7 V&P Problem 1.4, ACE 6-9, 27

Population grew each year.

Yes, same data, different scales.

Time of Day & Cans Sold

The number of cans sold might have changed due to meal times and snacks.

a. The speed stayed the same the whole time.b. Cyclist - no, you would get tired Van - yes, cruise control. Wind - maybe, the wind could stay the same.