The equation for QR is 5y = -4x +41. Is QR tangent to Circle O at R? R (4,5) No, because the slope of OR times the slope of QR does not equal 1. No, because the slope of OR times the slope of QR does not equal -1. Yes, because the slope of OR times the slope of QR equals 1. Yes, because the slope of OR times the slope of QR equals -1,
