Function or Not
Function or Not function?
(2,4),(2,5)
Not function
State the Domain and Range
{(2, –3), (4, 6), (3, –1), (6, 6), (2, 3)}
Domain: {2, 3, 4, 6}
Range: {–3, –1, 3, 6}
What is their geometric position?
y=3x-1 and y=3x-1
Coincident
Evaluate:
f(x)=-3x if x=2
-6
f(x)= 3x-6
what is the input value for which f(x) = 21?
x=9
Function or Not function?
(3,4),(2,4),(3,5)
Not function
State the Domain and Range
{(–3, 5), (–2, 5), (–1, 5), (0, 5), (1, 5), (2, 5)}
Domain: {–3, –2, –1, 0, 1, 2}
Range: {5}
What is their geometric position?
y=2x+4 and y=3x
Intersected
f(x)=2x+1
find f(-3)-?
f(-3)=-5
If f(x)=1/2x-5
find f(6)-f(4)=?
f(6)-f(4)=1
Function or Not function?
(a,1),(b,2),(c,1),(1,c)
Function
Find the domain of the function:
y=x3
Domain: All real numbers or
What is their geometric position?
y=3x+9 and y=3x+5
Parallels
f(x)=-(4x+2)
find f(7)=?
f(7)=-30
Solve the following system of equations by graphing method:
2x+4y=8
4x+8y=16
(2,1)
Function or Not function?
(2,4),(3,2),(-1,3),(2,3),(5,4),(-4,-1),(-1,5)
Not function
Find the domain of the function:
y=1/x
Domain: (−∞,0)U(0,+∞)
What is their geometric position?
y=-13+2.2x and y=2.2x+13
Parallels
Multiply a number by 3, then subtract 4. find the answer when f(5)?
f(x)=3x-4
f(5)=11
Divide a number by two, then add 4. Find the answer when f(6)=?
f(x)=x/2+4
f(6)=7
Function or Not function?
(1,4),(3,2),(-2,3),(2,3),(5,4),(-4,-1),(-3,5),(0,4),(4,2),(6,3),(-1,3),(-5,4),(7,-3),(-6,5)
Function
Find the domain of the function:
y=2/x+4
Domain:(−∞,-4)U(-4;∞)
What is their geometric position?
y=1/5x+2 and y= 0.2x+2
Coincident
Name of the functions
1. y=2x-1
2.y=3x2
3.y=2x3
1. linear
2. parabola
3.cubic parabola
Find: f(-3)+2*f(6)-3*f(4)
if the points (-3,5),(0,4),(4,2),(6,3),(-1,3)
answer: 5