Which function has a domain of all real numbers?

Use this graph to find the cost of 6 show tickets

Is of - 4x + 2? a. 3 b. 4 c. 6 d. 5

To find the inverse of a number a, one can use the equation f(c) = a-1/c=0 where c is the inverse of a use the secant method of finding roots of equations to find the inverse of a = 2.5 ,er = 0.001%