8th Grade Test Prep

Front

What is the formula to calculate time when distance and speed are known?

Back

Time = Distance ÷ Speed

Front

What does a non-linear function look like?

Back

A non-linear function can include variables raised to a power greater than 1, such as y = 4x + 3x².

Front

In the equation y = mx + b, what do m and b represent?

Back

m is the slope of the line, and b is the y-intercept.

Front

What does the y-value represent in a cost equation like y = 34.99x + 49?

Back

The y-value represents the total cost for x months of membership.

Front

How do you interpret a scatter plot with decreasing y-values as x-values increase?

Back

It indicates a negative correlation, meaning as one variable increases, the other decreases.

Front

What is the difference between linear and non-linear equations?

Back

Linear equations graph as straight lines, while non-linear equations graph as curves.

Front

What is the significance of the y-intercept in a linear equation?

Back

The y-intercept is the point where the line crosses the y-axis, representing the value of y when x = 0.

Front

How do you determine if a relationship is a function?

Back

A relationship is a function if each input (x-value) has exactly one output (y-value).

Front

What is the slope of a line?

Back

The slope is a measure of the steepness of the line, calculated as the change in y divided by the change in x.

Front

What does it mean if a scatter plot shows a positive slope?

Back

It means that as the x-values increase, the y-values also increase, indicating a positive correlation.