22-1 and 22-2 Formative Assessment

Front

What is an independent variable?

Back

An independent variable is a variable that is changed or controlled in a scientific experiment to test its effects on the dependent variable.

Front

What is a dependent variable?

Back

A dependent variable is a variable that is measured and affected in an experiment, depending on the independent variable.

Front

Write the equation for a monthly cell phone bill that includes a base fee and a per-minute charge.

Back

C = 15 + 0.20x, where C is the total bill and x is the number of minutes used.

Front

If Lisa bought 3 more shirts than twice the number of pants, how can this relationship be expressed mathematically?

Back

s = 3 + 2p, where s is the number of shirts and p is the number of pants.

Front

What does the equation x + 16 = y represent?

Back

It represents a linear relationship where y is 16 more than x.

Front

What does the equation 7x + 2 = 30 represent in a real-world context?

Back

It represents the cost of buying pet turtles for $7 each plus two cans of turtle food costing a total of $30.

Front

What is the purpose of using variables in equations?

Back

Variables are used to represent unknown values and to create general formulas that can be applied to various situations.

Front

How do you identify the independent and dependent variables in a situation?

Back

The independent variable is what you change, and the dependent variable is what you measure or observe.

Front

What is a linear equation?

Back

A linear equation is an equation that makes a straight line when graphed, typically in the form y = mx + b.

Front

What is the significance of the slope in a linear equation?

Back

The slope indicates the rate of change between the independent and dependent variables.