Vocabulary
This letter represents the slope in the equation y=mx+b
m
In y=4x+2, what is "b"?
2
The graph of a line goes up as it moves to the right. Is the slope positive or negative?
Positive
Slope=3, y-intercept=-1. Write the equation.
y=3x-1
A taxi charges $5 to start and $1 per mile. What is the slope?
1
This part of the equation tells you where the line crosses y-axis
y-intercept
In y=-3x+9, what is "m"?
-3
The y-intercept is (0,-4). Where does the line cross the y-axis?
At -4
Slope=-2, y-intercept=4
y=-2x+4
In the taxi problem, what is the y-intercept?
5
Slope is defined as this ratio
rise/run
In y=1/2x-10, identify m and b
m=1/2, b=-10
A line rises 2 units and runs 1 unit. What is the slope?
2/1
A line crosses the y-axis at 6 and has a slope of 1/2
y=1/2x+6
A phone company charges $20 per month plus $10 for activation. Write the equation
y=20x+10
A line with a slope of 0 is called this
Horizontal
In y=-7x, identify m and b
m=-7, b=0
A line starts at (0,5) and goes down 3 units for every 2 it goes right. What is the slope?
-3/2
A line has a slope of -3 and passes through (0,0)
y=-3x
A sweater costs $40 and is discounted $5 each week. Write the equation
y=-5x+40
A line with an undefined slope is this type of line
Vertical
In y=x+8, what is the value of m?
1
A line passes through (0,2) and (3,8). What is the slope?
2
A line has slope 5 and through (0,-7)
y=5x-7
A water tank has 200 liters and drains 8 liters per minute. Represent the water amount after x minutes
y=-8x+200