Math 8 Unit 5 Review 12/12

Front

Evaluate the expression: -7w^2 + 2w if w = -4

Back

-120

Front

Identify which of the following is NOT an integer: -\frac{16}{4}, 0, -\sqrt{25}, -4.7

Back

-4.7

Front

Determine if the relation is a function: (1, 2), (2, 3), (1, 4)

Back

No, it is not a function because the x-values do repeat.

Front

What is the independent quantity in the relation: Number of tickets (t), Cost (c)?

Back

Number of tickets (t)

Front

Which relation is NOT a function? {(-1, 2), (2, 3), (0, 4), (1, 5)}, {(4, 2), (4,3), (4,4), (4,6)}, {(1, 1), (2,2), (3,3), (4,4)}, {(1, 5), (2, 5), (8,5), (9,5)}

Back

{(4, 2), (4,3), (4,4), (4,6)}

Front

What is the definition of an integer?

Back

An integer is a whole number that can be positive, negative, or zero.

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

How do you determine if a relation is a function?

Back

Check if any x-values repeat; if they do, it is not a function.

Front

What is the formula for evaluating a quadratic expression?

Back

Substitute the value of the variable into the expression and simplify.

Front

What does it mean for a number to be rational?

Back

A rational number can be expressed as a fraction of two integers.