i need help what is the answer

Answer:
f(-5) = -5
Step-by-step explanation:
Whereas in an equation it is always, "f(x) = x + a/b/c (etc.)"
f(3) = x is 3
f(4) = x is 4
f(-5) = x is -5
Where we find where -5 is on the x-axis, it touches the graph on y = -5
Answer:70
Step-by-step explanation:
Cuz its start at 10 and its 10 20 30 40 50 60 70 so its 70