4.8,4.9.4.10 Practice

Front

What is an independent variable?

Back

An independent variable is the variable that is changed or controlled in a scientific experiment to test its effects on the dependent variable. For example, in a study measuring the effect of study hours on test scores, the number of hours spent studying is the independent variable.

Front

What is a dependent variable?

Back

A dependent variable is the variable that is measured and affected in an experiment. It depends on the independent variable. For example, in a study measuring the effect of study hours on test scores, the test score is the dependent variable.

Front

Write the equation for the height of a skeleton based on femur length: The height is about 30 inches taller than twice the length of the femur.

Back

h = 2f + 30

Front

Write the equation for the relationship between z and w if z is 2 less than w.

Back

z = w - 2

Front

If Becca started with 1 dog and added 2 dogs each month, how many dogs will she have after 3 months?

Back

7 dogs

Front

What does it mean to analyze data in an experiment?

Back

Analyzing data involves examining and interpreting the data collected during an experiment to draw conclusions and make decisions.

Front

What is the purpose of a control variable in an experiment?

Back

A control variable is kept constant to ensure that the results of the experiment are due to the independent variable and not other factors.

Front

Define a linear equation.

Back

A linear equation is an equation that makes a straight line when graphed. It can be written in the form y = mx + b, where m is the slope and b is the y-intercept.

Front

What is the slope of a line?

Back

The slope of a line is a measure of its steepness, calculated as the rise over run (change in y over change in x).

Front

What is a function in mathematics?

Back

A function is a relation that assigns exactly one output for each input. For example, f(x) = 2x + 3 is a function.