Test 1 Trimester 3 Review

• The test will cover the two major concepts

• Concept 1: Past the first quadrant and similar triangles.

• Concept 2: Statistics.

• Please refer to the previous lessons if you need additional information to the review.

y is the value of the y coordinate.x is the value of the x coordinate.

M is the slope

Knowledge chain

• If y is our y coordinate value and x is our x coordinate value then we can show that if we go up a value of y and over a value of x we have expressed our rise over run which we express as m.

• Y=mx or y = y x or y = rise x x runRefer to original lesson for an in depth example.

Practice

• Given X = 5 Y= 3

What is m or the slope? Write it in the form y=mx with a value for m.Graph the line both above and below the point

of origin or (0,0).

y = mx + bRemember math is a language. We know have directions

that tell us where to place a line on a coordinate plane. For example

Given x = 2 y = 4 b = 6

We know that we have y = 4 + 6 2

m therefore is equal to 4/2 or simplified it is 2 and the line crosses Y at an elevation of 6.

Practice

• Graph and write in y = mx + b form.

If x =2 y = 4 b =7

Statistics• Vocabulary

Spread: distance between data points.

Reliability

• Remember that with reliability it can be consistent but it does not mean that it is accurate or valid. For example if I consistently answer a problem incorrect that is reliable but not valid or accurate.

Mean Median ModeRefer to the original lessons for instruction on how to

calculate each

• Mean is the average of a data point.

• Median is the middle of the data.• Mode is the data point that occurs the most in

the data.Remember that the mean, median, and mode are

not always the same number. Think about the rock study and the effect of extreme data points upon the mean.

MADMean Absolute Deviation

• To find the Mean Absolute Deviation you must first find the mean or average of a set of data. Then find the difference between each data point and the mean. Then average the differences of all the data points.

Statistic

• A statistic is a number used to describe something about a set of data. Examples include but are not limited to mean, median, mode, and MAD.

Rock Study• Be prepared to answer questions about the Rock

study that we did in class.

• Possible questions:• What were the major findings of the rock study?• Use statistical vocabulary in your responses.• What problems with data collection and results were

evident in the study.• Were your initial assumptions correct or flawed.

Rock Study Pictures

Rock Study Pictures

Rock Study Pictures

Rock Study Pictures