Slope Formula Fun
Find the slope of the line passing through (2,5) and (4,9)
2
In the equation y=3x + 7, which number tells you where to start on the y-axis?
True or False: Every proportional relationship is a straight line through the origin
True
A taxi charges $3 per mile. Write the equation for the total cost y.
y=3x
If x increases by 1 and y increases by 4 every time what is the slope?
4
Calculate the slope between (-1, 4) and (3,-8)
-3
If a line has a slope of 2/3 , how many units do you move up and how many units do you move right?
Up 2, Right 3.
Which of these is non-proportional?
y=5x
y=5x-1
y=5x
A plumber charges $50 for a visit plus $25 per hour. Write the equation.
y=25x+50
In a table, if the point (0, -3) is listed, what is the value of b?
-3
Find the slope between (5,10) and (5,2).
Undefined
What is the equaton of a horizontal line passing through (0, -5)?
y = -5
In a table, if x=2 and y=10, and x=3 and y=15. Is it proportional?
Yes. k=5
A candle is 12 inches tall and melts 2 inches every hour. Write the equation.
y= -2x+12
Find the slope from this table:
2. 10
4. 20
6. 30
m = 5
A line has a slope of 1/2 and passes through (0,6) and (10,y). What is y?
y=11
If a graph starts at (0,2) and goes through (4,3) what is the equation?
y = 1/4 x + 2
Why is the equation y=4x+0 considered propotional?
Because the y-intercept is 0, meaning it passes through the origin.
You have $100 in your savings account and spend $10 per week. After how many weeks will you have $0.
10 weeks
Find the equation for this table:
1. 5
2. 8
3. 11
y=3x+2
What is the slope of a line passing through ( -1/2 , 4) and ( 1/2 , 9)?
m= 5
A line has a y-intercept of )0,0) and a slope of -1. What is the equation?
y = -x
A graph is a straight line but passes through (2,5) and (4,10). Is it proportional?
Yes. Because the ratio y/x is constant at 2.5 and it will hit (0,0)
A plane descends from 30,000 at a rate of 1,000 feet per minute. What is the equation for its height.
y= -1000x + 30,000
A table shows (2,7) and (4,11). What is the y-intercept?
b=3