The answer for the first one is y=-1/2x+4, you can find this by graphing it and finding the slope by using rise over run and once you have the slope you can plot the rest of the points to find the y-int. For the other one it is y=-3x+8. I also really suggest using the Desmos graphing calculator online, you got plot the points and then once you have an answer you can check it by plugging in the equation.
