Hi there,

The formula's are:

$\displaystyle y = -\frac{4}{3}x + 12.33$

$\displaystyle y= \frac{3}{4}x + 4$

I'm unsure about how I go about it? I can do simultaneous equations and stuff, but we haven't really covered it.

Can anyone point me in the right direction? I'm think I need to move the $\displaystyle x$ to the other side, but I'm not sure.

Thanks in advance