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Slopes
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Algebra
Slopes
9th
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26 Terms
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1
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the sum of twice a number and 9 is -25
2x +9 =25
2
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10 less than the quotient of a number and 3 is 8
x/3 - 10 = 8
3
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solve this equation: -45 = -4x - 11
x=14
4
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2/5 a - 9 + -17
a = -20
5
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6 - 4(3p-2)= 6(1-2p) - 1
no solution
6
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\-9 (n +4) = -5n - (4n +36)
infinite solution
7
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P = 21+ 2w
p-21
\------
2
8
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for domain and range, graphing, is it rise/ run or run/rise
run/rise
9
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(8, 2) (4,-1) (0,-1) (-4, 2) what’s the domain? what’s the range? function?
range = {-1,2} domain: {-4, 0, 4, 8}
10
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is domain X or Y
X
11
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Is range X or Y
Y
12
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is range left to right or up and down
up and down
13
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is domain left to right or up and down
left to right
14
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what does f(x) mean
you put whatever number is in the parenthesis in the x spots in your equation
15
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solve f(8)= -2x + 7
f(8)=9
16
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in a graph, if the coordinate pairs is horizontal is has what slope and crosses what axis
the slope is 0 and crosses the Y-axis
17
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in a graph, if the line is vertical, what slope and axis do it cross?
the slope is undefined and it crosses the x axis
18
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if you have a graph with 2 points use:
rise over run to find the slope
19
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identify the slope and y intercept of the equation
2x + 2y = -10
y= -x -5
20
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what is slope intercept for,
y = mx + b
21
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what makes it a function
you can’t have the same Y number, the idea of every x has one y
22
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how do you right standard form
Ax + By = C
23
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find the range of the function f(x)= x^2 -6x if the domain is {-7 , -2 , 1}
{91, 16, -5}
24
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describe the slope of parallel lines
equal
25
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describe the slopes of perpendicular lines
opposite reciprocals
26
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what is the vertical line test
there can not be more than one point in a vertical line for it to be a function
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