Functions and Direct Variation

Front

What is a function?

Back

A function is a relation between a set of inputs and a set of possible outputs where each input is related to exactly one output.

Tags

CCSS.8.F.A.1

Front

What is direct variation?

Back

Direct variation is a relationship between two variables where one variable is a constant multiple of the other, expressed as y = kx, where k is a non-zero constant.

Front

If (3, 5), (4, 9), and (2, 5) are points in a function, which ordered pair can be added without violating the function rule?

Back

(1, 9) is the only ordered pair that can be added.

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.A.1

Front

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

Back

A set of points represents a function if no two points have the same x-coordinate with different y-coordinates.

Tags

CCSS.8.F.A.1

Front

What is the formula to find pay in direct variation problems?

Back

Pay = (Hourly Rate) x (Number of Hours Worked).

Tags

CCSS.HSF-LE.A.1B

Front

If Shawn earns $123 for 20 hours of work, how much does he earn per hour?

Back

Shawn earns $6.15 per hour.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is the ordered pair of point A if it is located on the y-axis?

Back

(0, y) where y is any value.

Tags

CCSS.5.G.A.1

Front

Which axis goes up and down in a coordinate plane?

Back

The Y-axis.

Tags

CCSS.5.G.A.1

Front

What are the coordinates of a point on the x-axis?

Back

(x, 0) where x is any value.

Tags

CCSS.5.G.A.1

Front

True or False: The coordinates of a point are always written as (y, x).

Back

False. The coordinates are written as (x, y).

Tags

CCSS.5.G.A.1