looking at the residual for a single linear regression is significant can you help determine if there is any assumptions failed and how they are?

a want to random sample and independent observations, and you create the following residual plot to check your remaining assumptions. Residual Plot Residuals -1.5 -0.5 0.5 1.5 .. -1.0 -0.5 0.0 0.5 1.0 Fitted Values What assumption(s) have you failed? Select all that apply or "no assumptions failed." no assumptions failed sufficient sample size linearity O equal variance