Question

Using complete sentences, explain hot to graph the following piecewise function:
y=-x^2 if x<1
y=2x if x>1

Answer 1

the last one is x is greater than or equal to 1

Answer 2

for the first function y=-x^2, is just the part of the graph for when the x values are less than 1 with a open circle at 1. and the same with the next, all x values greater than or equal to one, with a closed circle on 1.