Use the image to answer the question.

Question

A coordinate plane reveals a curve.

Rhianna graphed a square root function. What is the equation of the function she graphed?

(1 point)
Responses

y=2x+4−−−−−√
y equals 2 Start Root x plus 4 End Root

y=12x−4−−−−−√
y equals Start Fraction 1 over 2 End Fraction Start Root x minus 4 End Root

y=2x−4−−−−−√
y equals 2 Start Root x minus 4 End Root

y=12x+4−−−−−√

Answer 1

y = √(2x - 4)