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Khan Academy Algebra Practice
Mendham High School
Ixl Algebra 2
Defining Functions and Relations Quiz
Evaluate each function for the given value.
1. If g(x) = 5x²+3x-2, then g(-2)=
13
-30
12
-27
2. If f(x) = 1-4x, then f(2a)=
1-8a
2-8a
2-10a
0
3. If f(x) = 9x²-x-9, then f(n-1)=
8n²+5n+12
n²+3n+1
9n²+19n+1
9n²-19n+1
4. If f(x) = 3x-201, then f(5)=
-189
-203
-186
-188
5. If f(x) = x
2
+ 33, then f(3a + 1)=
3a² + 3a + 17
6a² + 6a + 5
7a² + 6a + 4
9a² + 6a + 34
- Find a rule for the following points.
6. {(1,3), (3,9), (7,21)}
y=2x
y=3x
y=4x
y=-3x
7. {(1,-1), (2,0), (3,1)}
y=5x
y=x+1
y=9-x
y=x-2
8. {(1,5), (2,20), (3,45)}
y=5x²
y=4x²
y=x²
y=x²-1
9. {(-3, -6), (0,-15), (4,1)}
y=5x²
y=4x²
y=x²
y=x²-15
10. {(1,1), (2,4), (3,9), (-3,9), (-1,1)}
y=5x²
y=4x²
y=x²+1
y=x²
- If f(x)=x+1 and g(x)=2x-1, find each of the following.
11. g(f(2))
2
3
4
5
12. g(f(-1))+1
7
3
0
-1
13. g(f(0))+f(g(-3))
-5
1
11
-1
14. f(g(3))(g(5))
49
54
61
72
15. f(g(a))
2a
5a-1
a
7a
Press the Submit button to see the results.