Functions Expressing Relationships
Write the equation. What is 3 less than 7 times a number?
f(x)=7x-3
Which of the following is NOT a function?
A) (-1,6), (1, 6), (5,-4)
B) (5,-4), (-5,4), (-5,5)
C) (5,-5), (-5,5), (2,5)
B) (5, -4) (-5, 4) (-5, 5)
Write the equation. What is 6 more than 2 times a number?
f(x)=2x+6
What is the NAME of the test you can use on a graph to check if it is a function?
Vertical Line Test
Which of the following functions expresses this relationship? g is a function of x, and 2 more than the product of 3 and x equals g
A) g(x)= 3x+2
B) g(x)= 6x
C) g(x)= 2x+3
D) g(x)= 2-3x
A) g(x)= 3x+2
Which relation is a function?
A) (-2,1), (0,1), (1,-2), (3,4)
B) (-1, 5), (-2,3), (-2,1), (-3,-1)
C) (12,36), (9,27), (-6, 30), (9,18)
A) (-2,1), (0,1), (1,-2), (3,4)
Write the equation. What is 4 less than 9 times a number?
f(x)=9x-4
Which relation is a function?
A) (1,0), (5,2), (10,3), (10,-3)
B) (3,7), (5,8), (6,9), (5,11)
C) (1,2), (21,2), (2,8), (-2,8)
C) (1,2), (21,2), (2,8), (-2,8)
Which of the following functions expresses this relationship? h is a function of n, and the product of 6 and the difference between n and 5 equals h.
A) h(n)=30n
B) h(n)=6-5n
C) h(n)=6(n-5)
D) h(n)=6n-5
C) h(n)=6(n-5)
If you see a straight line on a graph and it intersects with both the Y and X-Axis, is it a function? Explain.
Yes, because it does not have repeating x-values and you can use the vertical line test to prove it.