Question

I need help on the last question

Answer 1

To know whether or not they are valid you would plug in the y that corresponds to the x with it.

For example,

(50,35)

35=0.5(50)+10

Multiply 50 with 0.5,

35=25+10

35=35

You would do the same for your others pairs, seeing if they all are valid. I think they should be.