December Quaterly assessment review 8th Grade

Front

What is a function in mathematics?

Back

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

Front

Determine if the following set of ordered pairs represents a function: (8, 8), (4, 4), (3, 4), (3, 8).

Back

Not a function, because the input 3 has two different outputs (4 and 8).

Front

Determine if the following set of ordered pairs represents a function: (2, 2), (4, 4), (1, 4), (4, 1).

Back

Not a function, because the input 4 has two different outputs (4 and 1).

Front

Which mapping represents y as a function of x?

Back

Mapping D represents y as a function of x.

Front

What is the equation for the total charge y for delivering x sandwiches if the delivery fee is $10 and the cost per sandwich is $1.75?

Back

y = 1.75x + 10.

Front

If a teacher buys markers at $3 per set and uses a $2-off coupon, what is the total cost equation?

Back

y = 3x - 2, where x is the number of sets bought.

Front

What is the definition of a relation in mathematics?

Back

A relation is a set of ordered pairs, which can show how two quantities are related.

Front

What does it mean for a relation to be a function?

Back

It means that for every input, there is exactly one output.

Front

How can you determine if a set of ordered pairs is a function?

Back

Check if any x-value is repeated with different y-values.

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.