Geometry
What is a bisector?
A line that splits something into two equal parts. Can be an angle or a segment.
the point (4, 3) tells us that f(4) =
3
What are the 3 "m's" of statistics?
Mean, median, mode
In y = mx + b
b =
m =
b is our y-intercept
m is our slope
How would I write:
X needs to be greater than or equal to 11
x > 11
What is true about the center of a dilation?
It stays in the same place
What are domain and range?
Domain is what we put in, range is what we get out
If our outlier is much greater than our data set, what direction does the data skew?
To the right
In inequalities, when do we use an open dot and/or dashed line?
If the equation cannot be equal
If graphing an inequality, we can test (0,0). If that point makes our equation true, should I shade towards or away from it?
shade towards, as the shaded region shows us our solutions
Finish the sentence:
Base angles in a isosceles triangles are...
equal
(two equal sides and two equal angles)
Take this equation: f(x) = 4x - 6
What does x equal when f(x) = 6
6 = 4x - 6
12 = 4x
3 = x
What is the mean, median, and mode of this data set?
8, 9, 3, 2, 1, 1, 6, 5, 1
Mode: 1, median: 3, mean: 4
Write an expression for this situation:
You start a job with four vacation days. Every month, you earn 2 more.
Use m to represent the number of months.
y = 2m + 4
Parallel slopes are the _____ and perpendicular slopes are _______ ________.
same, opposite reciprocals
If a triangle has angles that add up to 180, and a quadrilateral has angles that add to 360, how much do all the angles in a 6 sided figure equal?
720 degrees
What does the f and the x tell us in the function notation: f(x)
F is our function, x is our variable
Find the median, quartile 1, and quartile 3 of this data set:
1, 3, 4, 5, 5, 8, 10, 15
median: 5, quartile 1: 3.5, quartile 3: 9
if f(x) = 3x + 2,
What is f(2)
f(2) = 3(2) + 2
= 8
What equation represents a circle with a focus of (3,4) and a radius of 4:
(x + 3)2 + (y + 4)2 = 8
(x - 3)2 + (y - 4)2 = 16
(x - 3)2 + (y -4)2 = 16
What are our 3 trigonometric expressions and ratios?
tan(x) = opposite/adjacent
cos(x) = adjacent/hypotenuse
sin(x) = opposite/hypotenuse
What is the domain and range of this function:
12 > 2x - 2
Range: y < 12
Domain x< 7
What is the interquartile range?
Quartile 3 - Quartile 1
Absolute Values:
What does y equal?
y = |-3| + 1.
y = 4
Which equation is perpendicular to a line with a slope of 1/2 and passes through (5, 7)
y - 7 = 2(x - 5)
y - 5 = -2(x + 7)
y - 7 =-2(x -5)
y - 7 =-2(x -5)