We continue to work through the statistics part of Algebra 1. We will study measures of dispersion and begin a study of the normal distribution.

We will be reviewing algebra 1 topics by working on PSAT/SAT type problems. This may identify areas that need remediation.

9-1 Solving Quadratic Equations Using Graphs and Tables – We reviewed how to use a graph to identify the x-intercepts as solutions of a quadratic equation. If the graph of the function has no x-intercepts then the equation has no real solutions. If the graph touches the x-axis but does not cross it then there is only one x-intercept and one real solution. We practiced finding the vertex of the parabola by putting the equation in the form ax2 + bx + c and calculating the x-coordinate by the formula –b/2a. We plugged the x-coordinate of the vertex into the original quadratic equation to find the y-coordinate of the vertex.
Assignment: Complete the assigned problems for homework.

We will work on measures of dispersion; finding the values, using the terminology, and solving example problems.

We will study the normal curve and use the normal distribution to solve problems. Examples will include test scores, SAT scores, and IQ scores.

9-1 Solving Quadratic Equations Using Graphs and Tables – We learned to use a graph to identify the x-intercepts as solutions of a quadratic equation. Then we learned that a quadratic equation can have zero, one, or two real solutions. If the graph of the function has no x-intercepts then the equation has no real solutions. If the graph touches the x-axis but does not cross it then there is only one x-intercept and one real solution.
Assignment: Complete the assigned problems for homework.

We will calculate measures of center and dispersion. We will determine the appropriate situation in which to use each type of measure that we calculated.

We will draw a 12 by 12 grid. We will draw a triangle within the grid. We will find the probability that a random point falls inside the triangle. We will also use the experimental probability to estimate the area of an irregular region.

Finish Test on Topic 8 Quadratic Functions.

We will discuss a survey David found that classifies those who take it into a personality type. This is a great example of using statistics in sociology.