What is the Equation for this graph?

For a straight line: y=ax+b

x=0, y=3:

3=a×0+b, b=3

x=5, y=0

a×5+3=0, a=-3/5=-0.6

y=-0.6x+3

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step-by-step explanation:

to find if any function is an inverse of the other, put the first equation in as x in the next one. then simplify and solve. if at the end you get the statement y = x, then it is an inverse. if you get anything else, it is not.