7th Grade Review

Front

What is the constant of proportionality in a proportional relationship?

Back

The constant of proportionality is the ratio of the dependent variable to the independent variable in a proportional relationship, often represented as 'k' in the equation y = kx.

Front

How do you write an equation for a proportional relationship?

Back

To write an equation for a proportional relationship, use the form y = kx, where k is the constant of proportionality.

Front

What is the formula to calculate tax on a purchase?

Back

The formula to calculate tax is: Total Cost = Price + (Price * Tax Rate).

Front

How do you calculate the total cost of an item including tax?

Back

To calculate the total cost including tax, multiply the price by the tax rate, then add that amount to the original price.

Front

What is the formula for the circumference of a circle?

Back

The formula for the circumference of a circle is C = 2πr, where r is the radius of the circle.

Front

How do you round a number to the nearest tenth?

Back

To round a number to the nearest tenth, look at the hundredths place. If it is 5 or greater, round up; if it is less than 5, round down.

Front

What does it mean for two quantities to be proportional?

Back

Two quantities are proportional if they maintain a constant ratio to each other, meaning as one quantity increases, the other increases at a consistent rate.

Front

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

Back

The slope in a linear equation represents the rate of change between the dependent and independent variables.

Front

How can you determine the constant of proportionality from a table of values?

Back

To determine the constant of proportionality from a table, divide the value of the dependent variable by the value of the independent variable for any pair of corresponding values.

Front

What is the relationship between tax rate and total cost?

Back

The total cost increases as the tax rate increases, since the tax is a percentage of the original price.