Answer:
y=1/2x+1 or y=0.5x+1
this part I'm writing isn't important
Answer:
It is D, I think it’s because the letters need to be around in the same order
C (third graph, the parabola); To find if it is a function or not draw a vertical line on the graph. If the vertical line could never intercept the figure more than once anywhere on the graph then it is a function.