GUESS Method Use the GUESS Method to solve

GUESS Method Use the GUESS Method to solve this problem: The perimeter of a rectangular park is 360 yds. The park is 55 yds wide. How long is it? The solution is 125 yds

Precision and Accuracy VIDEO

Precision vs Accuracy – How well the measurement agrees with the “real” value Precision – How close the measured values are to each other

Precision can also refer to: The degree of exactness of a measurement.

Volunteers!! SHOW ME HOW ACCURATE AND/OR PRECISE YOU ARE!

Graphing Skills 2/10/2022 7

dr. Y mi. X n n n Dependent Responding Y-axis Manipulated Independent X- axis 2/10/2022 8

n n n 2/10/2022 Dependent variable that changes due to experiment. Responding (response) Y-axis Manipulated (stimulus) Independent variable that the scientist changes. X-axis 9

Title: ___________ DRY Axis 13 12 Labeling 11 10 9 8 Data 7 6 Intervals 5 4 2 1 1 2 3 Labeling 2/10/2022 5 6 7 MIX Axis 10

How do we make a line graph? n n Y n X 2/10/2022 A line graph ALWAYS has a title! A line graph has two different axis’s An axis is either the horizontal line (called x) or the vertical line (called y) that form the base lines of a graph. 11

X-axis and Yaxis n n n When you are making a line graph, the x-axis is always horizontal, and the yaxis is always vertical. The x and y-axis usually starts with zero on a graph Identify your dependent and independent variables 2/10/2022 12

Line Graph A line graph is a graph used to show change over time!! What can time be measured in? ? ? Seconds - Minutes - Hours – Days Weeks - Months – Years - Decades Centuries - etc. 13

When to use a line graph? Would we use a line graph in the following situations: • To show many people like pizza in this class? NO • To show much it rained each month this year? YES- because months and years deal with time. • To show many people live in Dallas, Texas? NO 2/10/2022 14

Birthdays ? Would we use a line graph to show when our birthdays are? n n 2/10/2022 Our birthday does deal with time doesn’t it? (months/years) But, our birthday is constant, meaning it never changes. A line graph shows change in time, so we would not use it for this type of graph. 15

n n n Plotting a Line graph When we are plotting a line graph, it is important to read what information is on each axis. There must be a label on each axis that describes the information. Much like a bar graph, we look at the x-axis first in order to plot our points. 2/10/2022 Time in minutes 16

Intervals n n n 2/10/2022 Interval is the space between two lines! It is important to make sure that the intervals on our axis are always equal. What do I mean by this? If we are graphing the temperature for a year, do we want to put 365 days on the graph, and 100 different temperatures? When we see a horizontal flat line, that means that there was no change during a specific time period. 17

Graph the following information. Which type of graph will you use? Be sure to have a title, proper labeling, accurate data, and appropriate intervals. Time (Days) Height(cm) 2/10/2022 0 1. 43 7 2. 16 14 2. 67 21 3. 25 28 4. 04 35 4. 67 18

The Effect of Time on Height 2/10/2022 19

Graph the following information. Which type of graph will you use? Be sure to have a title, proper labeling, accurate data, and appropriate intervals. 2/10/2022 Length (m) Time (sec) 15 10 98 6 56 12 34 8 72 2 43 4 20

The effect of time on length 120 100 80 60 40 20 0 2 2/10/2022 4 6 8 10 12 21