Mathematics Quiz

Which function can be used to model the data in this table?

• f(x) = 3x

• f(x) = x/2 - 1

• f(x) = x - 1

• f(x) = 2x – 1

An arithmetic sequence is shown: 7, 11, 15, 19, ... What is the recursive formula that was used to create this sequence?

• a_n = a_(n - 1) + 7; a_1 = 4

• a_n = a_(n + 1) + 7; a_1 = 4

• a_n = a_(n - 1) + 4; a_1 = 7

• a_n = a_(n + 1) + 4; a_1 = 7

The first term in an arithmetic sequence is 5. The fourth term in the sequence is -4. The tenth term is -22. Which function can be used to find the nth term of the arithmetic sequence?

• f(n) = -n

• f(n) = n + 4

• f(n) = -3n + 8

• f(n) = 1/2 n + 5 + 2

Which situation could be modeled by a function with a domain of all positive integers?

• the distance a runner has moved during a race as a function of time since the race started

• the amount of fish food required in a fish tank as a function of the number of fish in the tank

• the amount of power required to operate a computer as a function of the length of time the computer is on

• the amount of water required by an animal as a function of the mass of the animal

Which situation could be modeled by a function with a domain that includes positive and negative real numbers?

• the height of a plant as a function of time since the seed was planted

• the elevation of a hiker as a function of the number of steps taken

• the amount of time required to read a book as a function of the number of words in the book

• the amount of precipitation as a function of the outdoor temperature

Move the labeled points onto the coordinate grid to represent all the x- and y-intercepts for the graphed function. You may select the same labeled point 0, 1, or 2 times.

• Point at (-3, 0) for x-intercept and (0, 2) for y-intercept

• Point at (0, -3) for x-intercept and (2, 0) for y-intercept

• Point at (3, 0) for x-intercept and (0, -2) for y-intercept

• Point at (0, 3) for x-intercept and (-2, 0) for y-intercept

Which graph could represent the possible number of old chapters Vicky reviews, x, and new chapters Vicky learns, y, each week?

• Graph A

• Graph B

• Graph C

• Graph D

Which combination of computers, x, and tablets, y, can the computer store order?

• (8, 4)

• (10, 2)

• (7, 9)

• (5, 9)

Which system of inequalities can be used to determine the number of pounds of apples and the number of pounds of grapes that Jose can buy for a month?

• 1.5a + 2g ≥ 30

• 1.5a + 2g ≤ 30

• 2a + 1.5g ≤ 30

• 2a + 1.5g ≥ 30

Which system of inequalities represents the number of orders of plain bread, x, and cheesy bread, y, that can be made each day?

• 2x + 3y ≤ 80

• 2x + 3y ≥ 80

• 3x + 2y ≤ 80

• 3x + 2y ≥ 80