Combining Like Terms
3 + 7x + 2x
3 + 9x
3x = 9
x = 3
Slope is also known as...
Growth
Solve: 5 - 2 · 32
-13
If a graph has an upward trend, what is the correlation?
Positive Correlation
2p + 8p - p + 4
9p + 4
4x + 3 = 7
x = 1
Slope is always written as....
Rise over Run
Solve: (3-5)(6+2)
-16
How many points on a graph must you plot before drawing your line?
Three
2.5x + 3x - 18 + 12
5.5x - 6
y - 10 = -5
y=5
What is the form for slope/intercept?
Y = mx + b
Solve: 24 · (1/4) / -2
-3
Define a solution
A solution is a value for the variable that makes an equation true.
12y - 2y + 8x + x - 4
10y + 9x - 4
2y + y - 1 if y = –7
2(-7)+(-7)-1 = -22
What is the slope in the rule...
y = 2x - 6
2
Solve: 5 - (3 - 17)(-2 + 25)
327
How many kinds of solutions are there? What are they?
Three kinds: One Solution, No Solution, Infinite (All) Solutions
5.5k + 1.5 + 3 - k + b - 2k
2.5k + b + 4.5
(6 - p)(6 - p) if p = 0
(6-0)(6-0) = 36
If your slope is 2/3, define the rise and the run, and state the direction.
Rise: 2 up
Run: 3 right
Solve: -1.5 - 2.25 - ( -4.5)
0.75
Define y-intercept
The y-intercept is where your line crosses the y-axis.