Could someone help me with 37, If i put in x = -1 to get y I get 0, then I tried to derivate the function but the answers is all wrong, am i not supposed to use y-y0=k(x-x0)

Four equations are shown below.equation 1: y=2*equation 2: y=2x-5equation 3: y=x2 + 6equation 4: tdentify one linear equation and one nonlinear equation from the list.why each equation you identified is linear or nonlinear.nd one nonlinear equation from the list. state a reasonlinear equation