Functions
How can you tell if relationship represents a function?
for every input(x value) there is only one (y value) ?
Describe the slope of a horizontal line.
What is zero?
Solve: x - y = 11 and 2x + y = 19
What is (10, -1)?
A train traveled at a rate of 50 mph for 2 hours. How far did the train travel?
What is 100 miles?
Write 0.000678 in scientific notation.
What is 6.78 x 10^-4
Describe whether or not the relation below is a function: {(3, 2), (-3, 2), (5, 2), (-5, 2)}
This is a function because the x-values/domain does not repeat.
The slope of the line that passes through points (6, -3) and (4, -2).
What is -1/2?
-6x + 5y = 1 and 6x + 4y = -10
What is (-1, -1)?
Kroger is having a sale on ribeye steaks. A 16 oz package of steak costs $14.99. What is the unit price per ounce?
What is $0.94?
The negative square root of 16 is what type of number (rational or irrational)? Explain.
What is rational? It is a perfect square therefore it is -4.
This is used to determine whether or not a graph is a function.
What is the vertical line test?
The following three points are contained in the graph of a line: (2, 1), (4, 0), and (6, -1). What is the slope of the line?
What is -1/2?
7x + 2y = 24 Solve. 8x + 2y = 30
What is (6, -9)?
Trinitee flew from Atlanta to Orlando. The distance between the two cities is 288 miles and the flight lasted 1 hour and 45 minutes. What is the speed of the plane in miles per hour? (Round to the nearest whole number)
What is 165 mph?
On a number line, the square root of 8 would fall between these two whole numbers.
What is 2 and 3?
y = 3(x +6) +12
Yes because you can simplify to 3x +30
The slope of the line with the equation 2x + y = 4.
What is -2?
3x − 2y = 2 Solve. 5x − 5y = 10
What is (-2, -4)?
Katelynn jogged for 15 minutes at a speed of 3 miles per hour. Then she increased her speed for 5 miles per hour for 45 minutes. How far did she jog?
What is 4.5 miles?
When dividing scientific notation expressions, you _____ the first factors and ________ the exponents.
What is divide the first factors and subtract the exponents?
Which ordered pair represents a point that would lie on the graph of the linear function y = 2x - 4? Explain how you know. (2, 4) (6, 8) (-2, 0) or (5, 1)
What is (6, 8) because if you plug in 6 for x into the linear function, the correct output is 8.
The slope of the linear function -3x - 4y = 12.
What is -3/4?
A test has twenty questions worth 100 points. The test consists of True/False questions worth 3 points each and multiple choice questions worth 11 points each. How many multiple choice questions are on the test?
What is 5 multiple choice questions?
Kevin finished the 200 meter dash in 13.25 seconds. How fast did Kevin run? (Make sure to include the correct units and round to the nearest tenth)
What is 15.1 meters per second?
A rectangular section of a wheat farm has a length of 5 x 10^4 meters and a width of 6 x 10^3 meters. What is the area of the wheat farm? (A = L x W)
What is 3 x 10^8 square meters?