Pitotti's Panther Page

Sunday, January 27, 2013

Fingerprint Summaries

Specific Traits Lab

Room 403 is completing our Modern Genetics Unit with a Fingerprint Lab and Summary.

Watch for the amazing results!

Slope-Intercept Form

I think the most useful form of straight-line equations is the “slope-intercept” form:

y = mx + b

This is called the slope-intercept form because

“m” is the direction of the line called the slope and

“b” gives the starting point on the y axis called the y-intercept.

I like slope-intercept form the best. It is in the form “y=“, which makes it easiest to plug into, either for graphing or doing word problems. Just plug in your x-value; the equation is already solved for y.

But the best part about the slope-intercept form is that you can read off the slope and the intercept right from the equation. This is great for graphing.

y=5x+3

is an example of the Slope Intercept Form and represents the equation of a line with a starting point on the y axis at +3 and thedirection of the line is up 5 and right 1.

y= −2x + 6

represents the equation of a line with a starting point of +6 on the y axis and the direction of the line is 2 down and 1 to the right.

The easiest way to graph such a line, is to plot the starting point (called the y intercept)first. Then move the direction of the line (called the slope) in the form of a fraction, like rise over run, and from the y-intercept, count up (or down) for the rise, over (right ) for the run, and put the next point. Do it one more time. Then connect three points and this is your line.

A couple of examples might be helpful.

EXAMPLE : y = 3x + 2
SOLUTION:
Starting point (y intercept) = 2 on the y axis , and then the direction (slope) =

Start by graphing the y-intercept by going up 2 units on the y-axis.
From this point go UP (rise) another 3 units, then 1 unit to the RIGHT (run), and put another point. This is the second point. Connect the points and it should look like this:

EXAMPLE : y = -3x + 2
SOLUTION:
Y-intercept = 2, slope =

Start by graphing the y-intercept by going up 2 units on the y-axis.
From this point go DOWN (rise) 3 units, then 1 unit to the RIGHT (run), and put another point. This is the second point. Connect the points and it should look like this:

EXAMPLE : y =

x + 2

SOLUTION:
Y-intercept = 2, slope =

Start by graphing the y-intercept by going up 2 units on the y-axis.
From this point go UP (rise) another 3 units, then 5 unit to the RIGHT (run), and put another point. This is the second point. Connect the points and it should look like this:

Credit- La Paz Intermediate School by Mr. Tellier

Tuesday, November 6, 2012

DNA Project

DOUBLE HELIX PROJECT
Due Tuesday December 18th, 2012

The double helix project can be so much fun! Please use things you have around the house, they can be big or small as long as they're correct. Students received the instructions and rubric Monday the 5th of November, please look for it!

HAVE A BLAST!

Go to Fun Pics and scroll down to see some of the amazing projects from last year! It's worth it!

Here are some project ideas...

Way to recycle those unwanted cans!

Be creative, big or small.....

Legos anyone......

Sweet touch, don't you think? If you use candy, make sure your project is secure, it tends to fall apart easily!

Pony beads and floral wire! (or a coat hanger) Use what you have!

You can DO IT!! Any questions? ASK please! The project is due December 18th which is the Tuesday before Winter Vacation. The students have the assignment, I'll post a copy of the rubric soon!