Modules 4 & 5 Review for Test

Front

What is the equation that represents the relationship between the number of months (x) and the total membership (y) if a fitness club starts with 80 members and increases by 15 members each month?

Back

y = 15x + 80

Front

What is the equation of a line that passes through the points (1, 8) and (3, 12)?

Back

y = 2x + 6

Front

How do you find the slope between two points?

Back

Slope = (y2 - y1) / (x2 - x1). For points (-4, 3) and (-4, -7), the slope is undefined because the x-coordinates are the same.

Front

What is a function?

Back

A function is a relation where each input (x) has exactly one output (y).

Front

Which of the following is a solution of the equation y = 2x?

Back

(0, 0) is a solution because when x = 0, y = 2(0) = 0.

Front

What does it mean if a relation is not a function?

Back

It means that at least one input (x) is associated with more than one output (y).

Front

What is the slope of a vertical line?

Back

The slope of a vertical line is undefined.

Front

What is the slope of a horizontal line?

Back

The slope of a horizontal line is 0.

Front

How do you determine if a set of points represents a function?

Back

Use the vertical line test: if a vertical line intersects the graph at more than one point, it is not a function.

Front

What is the y-intercept of the equation y = 2x + 6?

Back

The y-intercept is 6, which is the value of y when x = 0.