Unsure how to write equation that matches function

Question

Use your graphing calculator to help you complete each part. 

A function squares the input then adds 3 to obtain the output. 

1) Write an equation that matches the function description. Use x for the input variable and y for the output variable

Answer 1

y = f(x) = x² +3

put that in your graphing calculator and you will see a parabola opening up with a vertex at (0, 3)