8th Math DCP 2 Review

Front

What is a proportional relationship?

Back

A proportional relationship is one in which two quantities maintain a constant ratio. In a graph, this relationship is represented by a straight line that passes through the origin (0,0).

Front

How do you find the slope of a line given two points (x1, y1) and (x2, y2)?

Back

The slope (m) is calculated using the formula: m = (y2 - y1) / (x2 - x1).

Front

What does the y-intercept represent in a linear equation?

Back

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

Front

Simplify the expression: 3x + 4x - 2.

Back

5x - 2.

Front

What is the square root of 40?

Back

The square root of 40 is between 6 and 7.

Front

What is the formula for calculating the area of a rectangle?

Back

Area = length × width.

Front

What does it mean for a graph to be non-proportional?

Back

A non-proportional graph does not pass through the origin and has a y-intercept that is not zero.

Front

How do you simplify the expression: 5(x + 2)?

Back

5x + 10.

Front

What is the slope of the line represented by the equation y = -4x + 2?

Back

The slope is -4.

Front

What is the difference between a linear equation and a quadratic equation?

Back

A linear equation has a degree of 1 and graphs as a straight line, while a quadratic equation has a degree of 2 and graphs as a parabola.