MMOD Midterm Review

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.

Front

Which set of values represents a function? (9,5) (10,5) (9,-5) (10,-5), (3,4) (4,-3) (7,4) (3, 8), (6,-5) (7, -3) (8, -1) (9, 1), (2, -2) (5, 9) (5, -7) (1, 4)

Back

(6,-5) (7, -3) (8, -1) (9, 1) is a function because no x-value is repeated.

Front

What is the slope-intercept form of a line?

Back

The slope-intercept form of a line is given by the equation y = mx + b, where m is the slope and b is the y-intercept.

Front

What is the equation of the line with a slope of -1 and a y-intercept of 2?

Back

y = -x + 2.

Front

Simplify the expression: 3 + 5x + 8 - 2x

Back

11 + 3x.

Front

What is the unit rate?

Back

The unit rate is a comparison of two different quantities when they are combined together, expressed as a quantity per one unit of another quantity.

Front

If you spend $40 on 5 pounds of concrete, what is the unit rate in dollars per pound?

Back

$8 per pound.

Front

How do you determine which is the better buy?

Back

To determine the better buy, calculate the price per unit for each option and compare them.

Front

What is the price per unit for a 12 pack of Coke for $3.50?

Back

$3.50 / 12 = $0.2917 per can.

Front

What is the price per unit for a 6 pack of Coke for $1.80?

Back

$1.80 / 6 = $0.30 per can.