Given: f(x)=2x-1
Evaluate: f(3)
5
What form of equations do we use for lines?
y = mx + b or slope intercept form.
Solve:
3x - 2 = -14
x = -4
Write an equation for a vertical line through the point (-3, 3)
x = -3
What is the slope of a line perpendicular to the x-axis?
m=undefined
What is the slope of this equation?
x = 5
Undefined Slope
Write an equation for a line with the following slope and points.
m = 2/3 and (0, -2), (3, 0)
y = 2/3x - 2
Graph the following equation. 8x + 4y = 16
Should be rewritten as y = -2x + 4 and then graphed.
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
Is x = 2 a solution to the equation 2(x - 5) + 3 = 13 ?
No it is not a solution.
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 did you start with? How much does each game cost? How much money is left after 8 games are played?
Start with $10.
Each game cost .75.
y = -0.75(8) + 10 y = -6 + 10 y = 4 $4 dollars left after playing 8 games.