Need help with this please

Choose the equation that represents the graph below: (1 point) graph of a line passing through points negative 3 comma 0 and 0 comma 3 y = x − 3 y = −x + 3 y = −x − 3 y = x + 3 will award !

Ineed with math stuff it involves graphs

If p(a) = 0.70 and p(b) = 0.20, then a and b are independent events if