Relations and Functions
(1,5) (2,4) (2,-4) (3,7)
What is not a function?
Find the slope:
(5,2) and (-3,1)
What is 1/8?
Find a parallel line:
y=4x+1; (7,3)
What is y=4x-25?
Is there a direct variation?
x: 32, 62, 81
y:256, 496, 648
What is direct variation?
Solve by graphing:
y=1/2x
y=x+1
What is (-2,-1)?
Is this a function?
(9,0) (7,2) (3,-2) (2,-4)
What is a function?
Find the slope:
(3,5) and (3,1)
What is undefined?
Find a perpendicular line:
y=3x+2; (-9,2)
What is y=-1/3x-1?
Is there a direct variation?
x: 15,24,32
y:75, 144, 224
What is not direct variation?
Graph by substitution:
4x-y=3
2x-y=7
What is (-2,-11)?
Write the function rule.
Input: 4,6,8
Output:6,8,10
What is f(x)=x+2?
Find the x- and y- intercept:
y=2x+1
What is y=1 and x=-1/2?
Find a parallel line:
-3x+y=9; (0,4)
What is y=3x+4?
Find the equation of direct variation.
y=10 when x=4
What is y=2 1/2x?
Solve by elimination:
-x+3y=-30
x+3y=18
What is (24,-2)?
Write a function.
Input:-2,0,2
Output: -7,-1,5
What is f(x)=3x-1?
3x+4y+12
What is y=-3/4x+3?
Find a perpendicular line:
-1/3x+y=2; (3,2)
What is y=3x-7?
Find the equation of direct variation.
y=0.9 when x=1.8
What is y=0.5x?
Solve:
-5x+10y=60
-4x+16y=32
What is (-16,-2)?
Graph the function:
y=-3/4x+1
Show graph.
Put into standard form:
(6,4) (2,6)
What is x+2y=14?
Find a parallel and perpendicular line:
y=x+2; (2,3)
What is y=x+1 is parallel?
What is y=-x+5 is perpendicular?
Find the equation of direct variation.
y=6 when x=30
What is y=1/5x?
Solve:
-1/2x-1/4y=3
-1/3x+1/6y=2
What is (-6,0)?