What equation do we use to graph a linear equation?
the slope-intercept form y = mx + b
Evaluate:
-2 - 5
-7
What form of equations do we use for lines?
y = mx + b or slope intercept form.
Solve:
-10 + 2
-8
What is the slope of a vertical line?
undefined
Describe how to graph y = 1/3x + 4
Graph should start with the point at (0, 4) Movement should be 1 up and 3 to the right continuing to another point. Movement could also be 1 down and 3 to the left.
What is the slope for this equation y = -x - 12
-1
What is the slope of this equation?
x = 5
Undefined Slope
Write an equation for a line with the following slope and points.
(0, -2), (3, 0)
y = 2/3x - 2
Describe how to graph y = -2
Graph should begin with a point on the y-axis at -2. A horizontal line should be drawn through -2 extending on both sides of the y-axis.
what is the y-intercept for this equation
y = -1/2x - 3
-3
What is the slope?
y = -2x + 4
-2
Write an equation for a line with the following two points. Find the slope and y intercept. (15, -10) (5, 10)
slope = -2 y intercept = 20
y = -2x + 20
What is the y-intercept for this equation
y = 1/2x -5
-5
m = 3/4 and b = -4
Write an equation
y=3/4x-4
What is the slope of a horizontal line?
0
The amount y(in dollars) of money you have left after playing x games at a carnival is y = -0.75x + 10. How much money do you have after playing eight games?
y = -0.75(8) + 10 y = -6 + 10 y = 4 $4 dollars left after playing 8 games.