Evaluate:
3(3)-3=
6
What form of equations do we use for lines?
y = mx + b or slope intercept form.
When graphing linear equations, do we plot the slope, y-intercept, or something else first?
We begin at the y-intercept.
In the following linear equation, what is the y-intercept? y = -3/4x
0
Solve:
3x - 2 = -14
x = -4
A pool holds 70 gallons of water and drains water at a rate of 2 gallon per hour. Write an equation to represent how long it would take to empty the pool given that the pool is full.
y-amount of gallons
x-time
y=-2x+70
Find the slope of the line that passes through the following points. (4,9) (10,14)
5/6
1. What type of line has an undefined slope?
2. What type of line has zero slope?
1. vertical
2. horizontal
Write an equation for a line with the following slope and points.
m = 2/3 and passes through the point (0, -2)
y = 2/3x - 2
Describe the line: y = -2 can draw or verbally describe
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.
Identify the slope and y-intercept of the equation: y=3+(1/2)x
m=1/2
b=3
Find the mean of the following numbers:
1,2,3,5,6,7,10
4.86
Write an equation for a line with the following two points (15, -10) (5, 10). The line has a y intercept of 20.
slope = -2 y intercept = 20
y = -2x + 20
Evaluate: y=2x+4
x y
-1 ?
0 ?
1 ?
(-1,2) (0,4) and (1,6)
Give an equation of a line that would be parallel to the line y=-3x-2
any line with a slope of -3 but with a different y intercept
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 does each game cost and how much money did you start with.
Each game is 75 cents and you started with ten dollars.