What is a function?
Relation where every x is paired with only one y.
How to find slope from 2 points

y-intercept of the function y = 4x - 6
-6
Write the equation of the line through (0, 7) and having a slope of -2/3.
y = -2/3 x + 7
Is the point (-2, 1) a solution to the following system of equations?
x - 2y = 0
2x + 3y = -1
No
What is the domain of a function?
What is the range of a function?
Domain: the x's
Range: the y's
Slope of this line:
-2
y-intercept of the function 2x - 5y = -10
2
Write the equation of the line passing through the points (4, 1) and (0, 6).
y = -5/4 x + 6
Solve by graphing:
4x + y = 6
y = 1/3 x - 7
(3, -6)
Is this a function?
(4, -6); (3, -2); (8, 5); (7, -1); (3, 2)
No, the x-value 3 is paired with 2 y-values (-2 and 2)
Slope of this line: 2x - 3y = 9
2/3
x-intercept of the function 2x + 5y = -10
-5
Equation of the vertical line through the point (4, 7).
x = 4
Is (5, 3) a solution to the inequality 2x - 3y < -1
No
If f(x) = 3x - 6, find f(-3).
-15
Slope of the line passing through (5, -1) and (2, -4)
1 or 1/1
Equation of the line shown: 
y = 1/2 x - 2
Equation of the line parallel to y = 5x + 6 and passing through the point (0, -8).
y = 5x - 8
If 2x + 3y ≤ 9, would you shade above or below the line?
Below
If f(x) = 2x + 5, find x when f(x) = 7
x = 1
Line with undefined slope
vertical line
Equation of the line shown: 
y = 3
Equation of the line perpendicular to 2x + y = 1 and passing through the point (0, 5)
y = 1/2 x + 5
Graph y > 3
