3x + 7 equal 13x equal -2x equal to 2x equals 5

I’m stuck on this i don’t understand.

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

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 !