Unit 4 Practice Test

Front

What does P(1.60) represent in the context of mailing a letter?

Back

P(1.60) = $1.72, which means a stamped letter weighing 1.60 ounces costs $1.72 to mail.

Front

What is a function in mathematical terms?

Back

A function is a relation that assigns exactly one output (y) for each input (x).

Front

Why is the graph a function?

Back

There is only one y output for each x input.

Front

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

Back

It means there is more than one y value for at least one x value.

Front

What is the domain of a function?

Back

The domain is the set of all possible input values (x) for the function.

Front

What is the range of a function?

Back

The range is the set of all possible output values (y) for the function.

Front

Identify the domain of g(x) = 2(x+1).

Back

The domain is all real numbers.

Front

Identify the domain of a(b) giving the number of dog treats per every b bags.

Back

The domain is positive integers.

Front

Identify the domain of c(d) giving the cost of renting a kayak for d hours up to a maximum of 10 hours.

Back

The domain is whole numbers, 1-10.

Front

What is the equation of a line in slope-intercept form?

Back

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