Lesson 1 1 How can you analyze data

Lesson 1. 1 • How can you analyze data? – By making different types of graphs: bar graphs, frequency tables, and histograms.

Lesson 1. 2 • How do you use the order of operations to evaluate an expression? – The order of operations tells us which operation to complete first when there is more than one operation in an expression. – PEMDAS 1. Evaluate expressions inside grouping symbols. 2. Evaluate powers. 3. Multiply and divide from left to right. 4. Add and subtract from left to right.

Lesson 1. 3 • How do you write and evaluate variable expressions? – To write a variable expression, look for words that indicate mathematical operations and replace the words with mathematical operations and variables. – To evaluate a variable expression, substitute the number for the variable, perform the operation(s), and simplify the result, if necessary.

Lesson 1. 4 • How do you evaluate expressions with powers? – Write the power as a product. – Multiply. – Follow the order of operations.

Lesson 1. 5 – 1. 6 • How do you use formulas to find unknown values? – Write down the formula. – Substitute the information you have. – Solve for the missing variable.

Lesson 1. 7 • How do you use the problem solving plan to solve problems? – By the steps in the plan you can identify what you need to know, decide on a strategy to use, carry out the strategy, and then check that the answer you calculate is reasonable.