Midterm Exam 2021 (Part B)

Front

What is the y-intercept of a line?

Back

The y-intercept is the point where the line crosses the y-axis, represented as (0, y).

Front

How do you find the y-intercept from a linear equation?

Back

To find the y-intercept, set x = 0 in the equation and solve for y.

Front

What does the point (0, 4) represent on a graph?

Back

It represents the y-intercept of a line, indicating that the line crosses the y-axis at y = 4.

Front

What is the elimination method in solving systems of equations?

Back

The elimination method involves adding or subtracting equations to eliminate one variable, making it easier to solve for the other.

Front

Solve for y: 4x + 8y = 20 when x = 2.

Back

y = 1.

Front

What is the equation of a horizontal line?

Back

The equation of a horizontal line is of the form y = b, where b is a constant.

Front

What does the equation y = 5 represent?

Back

It represents a horizontal line that crosses the y-axis at y = 5.

Front

How do you isolate a variable in an equation?

Back

To isolate a variable, perform inverse operations to get the variable on one side of the equation.

Front

Solve for v in the equation C = xv + x.

Back

v = (C - x) / x.

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.