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# Exam

## Exam

### Pregunta

1.- This is the graph of the function:

#### Respuestas

a) f(x) = x + 5

b) f(x) = -x - 5

c) f(x) = - x + 5

d) f(x) = x - 5

### Pregunta

2.- The function whose graph passes through the points (0,1) and  (1,5) is:

a) f(x) = 4x + 1

b) f(x) = x + 4

c) f(x) = 2x + 1

d) None of them

### Pregunta

3.- The graph of f(x)= x2 - 4 is:

a)

b)

c)

d) None of them

### Pregunta

4.- Find out a quadratic function knowing that the vertex of its graph is (1,-1) and passes through the origin.

#### Respuestas

a) f(x) = x2

b) f(x) = x2 - 2x

c) f(x) = x2 + 2x

d) None of them

### Pregunta

5.- The vertex of the parabola of the graph of the function f(x) = -x2 + 4x - 2 = 0 is

a) (2,2)

b) (-2,14)

c) (0,-2)

d) None of them

### Pregunta

6.- This piecewise function is:

a)

b)

c)

d) None of them

### Pregunta

7.- The function of this graph is:

a) f(x) = 3/x

b) f(x) = -3/x

c) f(x) = -1/x

d) None of them

### Pregunta

8.- The graph of the function y = 4x is:

a)

b)

c)

d)

### Pregunta

9.- This function is:

#### Respuestas

a) f(x) = log1/5 x

b) f(x)= log5 x

c) f(x) = 5-x

d) None of them

### Pregunta

10.- Decide which of the following sentences is false:

#### Respuestas

a) The graphs of all the exponential functions, f(x) = ax, pass through the point (0,1)

b) The graphs of all the logarithmic functions, y = logax, pass through the point (1,0)

c) The graph of none inverse proportionality function passes through the origin

d) All of them are false