Functions
How can you tell if a graph is a function?
If it passes the vertical line test.
What is a right triangle?
A triangle containing a 90 degree angle.
The line going across a circle through its center is called the diameter. If you know a circle's diameter, how can you find its radius?
Divide the diameter by 2.
How do you find the median of a data set?
Order the data from least to greatest, then find the data value in the center.
If there are two data values in the center, add them and divide by 2.
What is the theoretical probability of flipping a coin and landing on heads?
1/2 or 50%
How can you tell if a relation is a function?
Every input/x-value has exactly one output/y-value.
What is the longest side of a right triangle called?
The hypotenuse
What is the formula for the volume of a rectangular prism?
V=lwh
How do you find the mean of a data set?
Add all the data values, then divide by the number of values.
What is the probability of rolling a die and landing on 2?
1/6
What is the initial value of the function y=3x-10 ?
-10
What is the side across from the 90 degree angle called in a right triangle?
The hypotenuse
A cylinder's volume is 27pi ft3. What is the volume rounded to the nearest tenth? (Use a calculator.)
84.8 ft3
When you add or subtract a data value from a set, is the mean or the median affected more?
The mean is affected more.
Theoretical probability is what we _______ to happen.
Experimental probability is what ________ happen.
expect
does
What is the rate of change of the function y=8x+9 ?
8
What is the pythagorean theorem?
a2+b2=c2
What is a net?
The 2-dimensional surface that can be folded into a 3-dimensional shape
A scatter plot shows ______ data.
The line of best fit shows __________ data.
real
estimated
Johnny wants to know the school's favorite sport. He waits until basketball practice is over, and asks all the players their favorite sport. 65% say basketball. Johnny infers that the school overall likes basketball best. Is his inference valid or invalid? Why?
Invalid - he took a biased sample that is not representative of the entire school.
How can you tell if a function is linear?
If its graph is a straight line or if it's in the form y=mx+b.
If the legs of a right triangle are 6ft and 8ft, how long is the hypotenuse?
10ft
Cylinders and cubes are types of _________.
(Hint: starts with a p)
Prisms
If a graph's rise is 12 and run is 3, what is its slope?
4
If there are 6 pink marbles, 8 blue marbles, and 10 green marbles in a bag, what is the probability of drawing a pink marble?
6/24 =1/4 = 25%