Q2 Review 8th grade

Front

What is a system of equations?

Back

A set of two or more equations with the same variables. Solutions are the points where the equations intersect.

Front

What does it mean if a system of equations has no solution?

Back

It means the lines represented by the equations are parallel and never intersect.

Front

How do you find the slope of a line given two points?

Back

Use the formula: slope (m) = (y2 - y1) / (x2 - x1).

Front

What is the slope of the line that passes through the points (10, 1) and (5, 2)?

Back

-1/5

Front

What is slope-intercept form of a linear equation?

Back

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

Front

How do you convert an equation to slope-intercept form?

Back

Isolate y on one side of the equation.

Front

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

Back

It is the point where the line crosses the y-axis (x=0).

Front

What is the equation for the cost of hamburgers from McDonald's if each hamburger costs $1.5 and there is a $5 delivery fee?

Back

y = 1.5x + 5, where x is the number of hamburgers.

Front

What is the equation for the cost of chicken sandwiches from KFC if each sandwich costs $2.5?

Back

y = 2.5x, where x is the number of sandwiches.

Front

What does it mean if two equations represent the same line?

Back

They have infinite solutions because every point on the line is a solution.