value of a using graph

Question

Find the value of "a" using the graph:

 

y=f(x)

 

f(0)=a

f(a)=0

f(a)=-1

f(a)=1

 

Graph shows curved line with points at (-1,1) (0,0) and (1,-1)

 

 

Answer 1

f(0)=a

 

What is the value y on the y-axis?

 

 

f(a) = 0

 

What value does the curve cross the x-axis?

 

 

f(a) = -1

 

The value of a is the x coordinate when y=-1

 

 

f(a) = 1

 

The value of a is the x coordinate when y=1