8th grade math reference chart

Front

What is the slope of a line?

Back

The slope of a line is a measure of its steepness, usually represented as 'm'. It is calculated as the rise over run, or the change in y divided by the change in x.

Front

What is the formula for Direct Variation?

Back

The formula for Direct Variation is y = kx, where k is a non-zero constant.

Front

What is Compound Interest?

Back

Compound Interest is the interest calculated on the initial principal and also on the accumulated interest from previous periods. The formula is A = P(1 + r/n)^(nt), where A is the amount, P is the principal, r is the rate, n is the number of times interest is compounded per year, and t is the time in years.

Front

What is the Slope-Intercept form of a linear equation?

Back

The Slope-Intercept form is y = mx + b, where m is the slope and b is the y-intercept.

Front

In the formula S = Ph for lateral surface area, what does 'P' represent?

Back

In the formula S = Ph, 'P' represents the perimeter of the base.

Front

What is the formula for finding the area of a triangle?

Back

The formula for the area of a triangle is A = 1/2 * base * height.

Front

What is the Pythagorean Theorem?

Back

The Pythagorean Theorem states that in a right triangle, the square of the length of the hypotenuse (c) is equal to the sum of the squares of the lengths of the other two sides (a and b): a² + b² = c².

Front

What is the formula for the volume of a cylinder?

Back

The formula for the volume of a cylinder is V = πr²h, where r is the radius and h is the height.

Front

What is the definition of a variable in mathematics?

Back

A variable is a symbol used to represent an unknown value in mathematical expressions or equations.

Front

What is the difference between mean, median, and mode?

Back

Mean is the average of a set of numbers, median is the middle value when the numbers are arranged in order, and mode is the number that appears most frequently.