Help easy math problems

What is the range of the data below? .8090100

Find the length of the normal and the angle it makes with the positive x-axis. (see pictured below)

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