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NAME _____________________________________________ DATE __________________ PERIOD _________
Lesson 3 Skills Practice
Functions and Equations
Write an equation to represent each function.
1.
Input, x
0
1
2
3
4
Output, y
0
3
6
9
12
2.
y = 3x
3.
0
1
2
3
4
Output, y
0
1
2
3
4
Input, x
0
1
2
3
4
Output, y
7
8
9
10
11
Input, x
0
1
2
3
4
Output, y
2
14
26
38
50
y=x
Input, x
1
2
3
4
5
Output, y
7
14
21
28
35
4.
y = 7x
5.
Input, x
y=x+7
Input, x
2
4
6
8
10
Output, y
5
9
13
17
21
6.
y = 2x + 1
y = 12x + 2
Graph each equation.
10
9
8
7
6
5
4
3
2
1
O
8. y = x + 6
y
y = 4x
1 2 3 4 5 6 7 8 9 10x
10
9
8
7
6
5
4
3
2
1
O
9. y = 2x + 1
y
10
9
8
7
6
5
4
3
2
1
y=x+6
1 2 3 4 5 6 7 8 9 10x
10. ANIMALS A manatee eats an average of 70 pounds of
wet vegetation each day. The equation y = 70x describes
the amount y that a manatee eats in x days. Graph the
function.
y = 2x + 1
1 2 3 4 5 6 7 8 9 10x
O
500
450
400
350
300
250
200
150
100
50
O
120
y
y
y = 70x
1 2 3 4 5 6 7 8 9 10x
Course 1 • Chapter 8 Functions and Inequalities
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7. y = 4x