unit 5: Unit 5

Day 1:

Daily objective: Student will use the line of best fit to find the equations of lines.

The line of best fit is a mathematical function that has the best fit to a series of data points. In other words, the line of best fit is a straight line that goes through the graph. It is the average of the graph points, you want to try to get the same number of dots one each side of the line. The data points that the line hits will help you find the equation needed for your line.

Once you get your two points then you will notice that they make a triangle. This triangle is key to finding the equation of the line of best fit.

QUIZ

1) Draw a line of best fit on this graph:

2) Write an equation of this graph using your line of best fit:

3) Should the line of best fit touch every point on the graph?

Answer key

1.)(180,110. )( 710,180)

2.)y= .132x + 17

3.) no it should preferably touch two!

Day 2

Daily objective: Students will write the linear equation of a line using data from a line of best fit, or 2 given points.

Quiz:

1) Write an equation for the points: (3,1) and (5,7)

2)Write the equation of a line that goes through the points (1,8) (4,14)

3) How do I pick the two data points when I find the equation?

Answer Key

1.) The equation is y=3x-8

2.) The equation is y=2x+8

3.) The two data points that are the ends of the line of best fot are the two pointed you use to find the equation.

Day 3 (old checklist)

Daily objective: students will be able to find the number of outcomes for compound events, conditional events, and compute probability and odds.

Quiz

1.) There are 14 marbles, two blue, and 12 are red. What's the probability that I will pull out a blue marble.

2.) There are 3 shirts, 3 shorts, and 3 pairs of shoes. How many outfits can you come up with?

3.) Marcus has twelve pairs of Jordan's, six pairs of nike's, and two pairs of Adidas. What's the probability that he will wear his Adidas shoes.

Answer Key

1.) The probability of pulling out a blue marble is 1 in 7.

2.) The number of outfits that you can make is 27.

3.)The probability that he will wear his Adidas shoes is 1 in 10.

Day 3 (new checklist)

Daily objective: students will define the y-intercept in math as well as translate it to a real world meaning. The y-intercept is the data point that touches and intersects with the Y-axis.

Quiz

1) What is the Y-intercept on this graph?

2) What is the Y-intercept on this graph?

3)Can the Y-intercept be a negative point?

ANSWER KEY:

1) Y-intercept=6

2)Y-intercept=2

3)Yes the y-intercept can be a negative point

Day 4

Daily objective: students will graph linear inequalities. After you graph an equation, you will graph an inequalities by shading the portion that X could possibly be.

Quiz

1) Graph the linear equalities on the graph above : X > y-2

2)Graph the linear equalities: X > y+2

3)Can you have two inequalities graphed at the same time?

answer key:

3.) Yes you can have two inequalities graphed at the same time.

Day 5

Daily objective: students will be able to write the equation of a line given the two data points. With this students will be given two data points, and with that information they would be able to find the equation of a line.