Praxis Core Math 5733 | Live | Kathleen Jasper

Kathleen Jasper welcomes attendees to the Praxis Core Math webinar, instructing them to check their email for handouts. She outlines the structure of the Praxis Core Math exam, covering numbers and quantity, data probability and statistics, and algebra and geometry, with an emphasis on the broad range of topics within number and quantity.

The presenter demonstrates how to approach a percentage increase problem involving manatee populations. She emphasizes the importance of understanding whether the change is an increase or decrease and calculating the percentage change based on the original population. The solution process involves subtracting the initial population from the final population, dividing by the initial population, and expressing the result as a percentage.

The focus shifts to data probability and statistics, particularly interpreting pie charts. Kathleen advises on the use of online calculators for Praxis Core exams and explains how to calculate the number of students choosing photography as an elective from a given percentage. She also discusses the importance of understanding the difference between percentages and actual counts.

Kathleen introduces scatter plot graphs and explains how to identify correlations. She differentiates between strong and weak correlations and between positive and negative correlations. The presenter provides strategies for eliminating incorrect answer choices based on the pattern and direction of the data points in the scatter plot.

The presenter discusses how to interpret a scatter plot that shows the relationship between hours exercised and weight lost. She clarifies that the correlation is positive, as more exercise correlates with more weight lost, and demonstrates how to eliminate incorrect answer choices by understanding the concept of correlation rather than causation.

Kathleen teaches a method for solving algebraic problems by eliminating answer choices that do not fit the given conditions. She uses the example of slope-intercept form and demonstrates how to identify the correct answer by eliminating negative slopes and strong correlations that do not match the scatter plot data.

The presenter solves a geometry problem involving scale models and proportions. She uses the given scale ratio to find the height of an actual statue, given the dimensions of a model statue, by setting up a proportion and solving for the unknown height.

Kathleen approaches a probability problem where the goal is to find the number of yellow squares in a bag. She uses the given probability of selecting a yellow square and sets up a proportion to find the solution, emphasizing the importance of understanding the total number of squares and the concept of a reduced probability.

The presenter simplifies algebraic expressions to find equivalent forms of '4a squared'. She carefully examines each option, applying rules of exponents to determine which expressions are equivalent. Kathleen also demonstrates how to solve for a variable in terms of another, using algebraic manipulation.

Kathleen shows how to solve inequality problems by using answer choices to eliminate incorrect options. She emphasizes the importance of understanding the inequality signs and how they relate to the problem's constraints, such as spending a maximum of $300. The presenter also explains how to isolate variables in an equation to express one in terms of another.

The presenter tackles a geometry problem involving parallel lines and angle measurements. She uses the properties of parallel lines to find the value of an unknown angle, demonstrating the concept of equal opposite interior angles and how to set up and solve a simple equation to find the angle's measure.