Which equation describes this relationship?

its the first one

Step-by-step explanation:

because you just leave the t alone and bring down the 5 and you get t=5g then since you have to pay 20 your taking away money and using it to pay that bill and therefor it makes it minus and your equation will be t=5g-20 hope this helps :)

after going and makeing graphs i would go with a,

there is nothing that is matches the graph. if there was i would show you. but therefore my answer is a.

hope i

-lavira: )