Question

Oh which of the following lines does the (7,1) lie?

1. Y=-4x+3
2. Y=5x+4
3. Y=x-10
4. Y=-x+8

Answer 1

Well, I'd suggest to plug this point into every each of the equations and see which one gives the accurate information.

Answer 2

I'll start with number 1:
y=-4x+3
i need to plug in (7,1) to check if it gives the correct y value of 1 if i were to plug in x=7
\(\Large y=-4(\color{red}7)+3\)
\(\large y=25~~That's~Wrong!!\) We need y=1, not 25

Answer 3

Therefore, equation #1 is incorrect. Now try the rest.